Exploring the historical boundaries of every European country
Oct 23, 2026
Last week I made a video that was a little unnecessarily long
and then this week I'm
making a video about every European country because why not?
Europe has about 50 countries
and each of them has a specific size of course
but at one point in history most of them were
considerably bigger than they are today.
Some of them were huge like Bulgaria which is pretty
small today at around 110,000 square kilometers
but used to be gigantic in the 9th century with
its Balkan Empire which stretched
to at least 400,000 square kilometers, conquering various
lands throughout the Balkans,
occupying entire modern countries like Romania, Moldova, Serbia,
parts of Hungary, Greece, even stretching into Ukraine.
Byzantine and later Ottoman conquests
reduced it and Bulgaria lost most of its land.
And just like it, a lot of countries went through
similar processes.
So in this video, we are going to take a look at every European country
at its greatest extent.
Let's do it alphabetically, starting
with Albania. Their current size is only
about 28,000 square kilometers.
However, their largest modern extent was during their brief
independence in 1912 when it included parts of modern Kosovo
and western North Macedonia.
They didn't keep it for long soon after
the London Conference of 1913 officially drew Albania's
modern borders, giving Kosovo back to Serbia at the time
and western Macedonia to Serbia and
Greece. Albania also lost the northern Epirus region,
claimed by Greece as well, and so today
it is slightly smaller than it once was.
And since we're here in the region, maybe we can
mention Kosovo straight away.
It's a very recent country, and so it's essentially as big as it ever
was. I guess you could connect it to the ancient kingdom of Tardania,
which was centered around
modern Kosovo in the 4th century BC,
but it might be a little bit of a stretch. Next is Andorra,
which in similar fashion is as big as it's ever been.
Founded as a co-principality in 1278,
the small and mountainous country has always had
the same size of only 468 square kilometers.
But up next is a big one
and one of the best examples for this greatest extent to modern
size comparisons, Austria.
Their current size is 83,879 square kilometers, but it used to be
much bigger. The Austro-Hungarian Empire,
which existed from 1867 to 1918, covered over 676
thousand square kilometers.
And even if we want to argue that most of that was the kingdom of
Hungary within the empire,
the Austrian empire alone included Austria proper, Czechia, Galicia,
Tyrol, Slovenia, and parts of Croatia.
Before that, the Habsburg monarchy controlled even more
land, including Spain and parts of the Holy Roman Empire
at various points. The Habsburgs gained
territories through dynastic marriages, diplomacy,
and wars, controlling much of central and eastern
Europe. After World War I, the Austro-Hungarian Empire dissolved.
Austria became a small republic,
never being as big as it used to be.
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And now, let's get back to the video.
Going on to the B's we have Belarus.
Its current size is 207,000 square kilometers, but
it's never really been any bigger.
Belarus as a concept was created after the dissolution of the
USSR, before that it had been part of other large states in the region,
like the Polish-Lithuanian
Commonwealth. But Belarus is neither Polish nor Lithuanian,
so attributing that size to it would
be wrong in my opinion.
The only medieval state I could trace it back to is the Principality of
Polotsk which existed in part of modern Belarus
but it was smaller than the modern country.
When it comes to Belgium,
their current size is around 30,000 square kilometers.
Belgium was also never any bigger within Europe.
The only exception we could make to that
statement is the territories that it held during
their revolution to break away from the Netherlands
briefly holding Luxembourg
and the Dutch Limburg province during the war.
Belgium's overseas empire, however,
peaked in the early 20th century with the Congo Free State at
2.3 million square kilometers.
But my point here isn't to include colonial empires,
because they were precisely that, colonies,
not integral parts of this country. So,
for the sake of this video and this greatest extent concept,
we're going to stick to continental
Europe. I'm sorry, Portugal. Moving on to Bosnia and Herzegovina.
The current country is about 51,000
square kilometers, but the medieval kingdom of Bosnia,
which existed in the 14th century,
covered parts of Croatia, Serbia, and Montenegro too.
However, their largest extent didn't last
long. The Ottomans conquered it in 1463,
fully incorporating all of Bosnia into their empire.
It later became a part
of Yugoslavia until gaining independence under its modern borders.
It's even arguable that today Bosnia proper
is only actually half of the country, with
the Serbian-controlled Srpska holding
a de facto rule on the other half.
And we already covered Bulgaria at the start of the video,
so now we can move forward to
the seas, starting with Croatia.
Croatia's size today is 56,594 square kilometers,
but its largest extent was hundreds and hundreds
of years ago, the Kingdom of Croatia in the 11th and 12th century,
which was independent
before joining Hungary. It controlled Dolmatia and parts of Bosnia.
It then lost its influence
due to neighboring powers taking over,
such as the Habsburgs, the Hungarians and the Ottomans.
Technically outside of continental Europe,
but in the continent of Europe, is the island
of Cyprus. Its current official size is 9,251 square kilometers,
but arguably it's less,
about half, since the Turkish northern Cyprus
breakaway state takes up half of the island.
But between the 12th and 15th centuries, they had more land.
Not only did it control the entire
island, but also some small territories in the Middle East coast.
It was ruled by the Lusignan
dynasty after the Crusaders took over the island
from the Byzantine Empire in 1191. It was later
conquered by the Ottomans in 1571.
With Czechia, we immediately think of Czechoslovakia, which was
of course larger, the current size of the country
is 78,000 square kilometers while the union was
140,000. However, I believe their largest extent was during the 13th
and 14th centuries when the
medieval kingdom of Bohemia held Czechia proper plus lands
in what is now Austria to the south
and Germany to the north.
Regarding Denmark, its current size of 42,933 square kilometers seems
pretty small when we compare it to the greatest extent
of the Kalmar Union, which existed between
1397 and 1523. It united Denmark, Norway, Sweden,
Iceland and Greenland. It was achieved by Queen
Margaret I of Denmark and controlled a territory
of over 2.8 million square kilometers. Sweden left
the Union in 1523. Denmark lost Norway to Sweden in 1814
but retained Greenland and the Faroe
islands which it holds until today
and will continue to because they're not for sale.
Estonia and Latvia we should actually cover together
because their greatest extent in
the past actually happened when the two countries were united,
or rather the two regions.
Estonia is 45,000 square kilometers today,
Latvia is slightly bigger at 64, but they
used to be bigger both of them,
if nothing else because they existed together through
the medieval Livonian confederation
which stretched across these two Baltic regions.
it was absorbed by Poland, Lithuania, Sweden and later Russia.
They regained independence in 1918
and then again in 1991. And I think we have
to interrupt the alphabetical order a little bit
more because since we're here we might as well cover Lithuania.
Its current size is 65,300
square kilometers but its largest extent,
the Grand Duchy of Lithuania in the 14th to 16th
centuries was 132,000 square kilometers.
It then united with Poland into the Polish-Lithuanian
Commonwealth which took up a gigantic 1 million square kilometers.
Eventually it became weakened
and partitioned between Russia, Austria and Prussia.
And I would say that is also the greatest
extent of Poland itself, although at other points
in history it was also bigger than it is today.
For instance, interwar Poland had 387,000 square kilometers,
it was slightly larger than the modern
one, which only has 322. Finland's case isn't
as noticeable as Poland's, but it also used to be a
little bit larger. Its current size is 338,000 square kilometers,
but it also used to control
a larger part of Karelia, Sala and Petsamo up north.
The winter war against the Soviets in 1939
led to these territorial losses to the Soviet Union,
which weren't recovered when it collapsed
in 1991. But with France, we go back to a case of a gigantic contrast.
Its current size is quite
large already, at 551,000 square kilometers,
but during the early 19th century, as Napoleon
conquered most of Europe,
France's direct and indirect territorial control grew a lot,
arguably to 860,000 square kilometers,
ruling Spain, Italy, the Benelux, Western Germany,
and Poland. Napoleon's defeat in 1815 ended its European dominance
and brought France
back down to its current borders.
And Germany is, as you probably know, another big one.
Its current size is 357,000 square kilometers.
It used to be slightly bigger under the German
Empire between 1871 and 1918,
which controlled more territories in Europe before losing them
after World War I. However,
its peak territorial control came under the Third Reich in 1942
during World War II. It essentially controlled all of Europe,
with the exception of the UK,
neutral states like Switzerland, Portugal, Spain,
and Sweden, and other allied powers. The direct
control of their territory was about 633,000 square kilometers,
which they lost entirely
after the war. Further south, and also starting with a G,
we have Greece, currently at 131,000
square kilometers. It's a little bit difficult to choose
which former state we should take a look at
when it comes to measuring the greatest extent of a Greek nation.
I guess it would either be the Byzantine Empire
or maybe Alexander the Great's empire
at its whopping 2 million square kilometers,
although many claim Alexander was Macedonian,
attributing its predecessor status to northern Macedonia,
which is now only 25,000 square kilometers.
This is a point of great dispute between Macedonians and Greeks,
which have their own region of Macedonia,
arguably more connected to Alexander's original kingdom.
modern Greece's largest extent, I guess,
technically was in 1920 with the Treaty of
Sèvres, which gave it Thrace and parts of Turkey,
but this control never materialized,
so I guess we could also say that Greece now
is at its largest territorial extent.
Hungary, however, is another fascinating example
of a country that used to objectively be much
larger. Today, it's 93,000 square kilometers,
but the medieval kingdom of Hungary,
stretched over modern Hungary, Slovakia,
Croatia and parts of Romania, Ukraine, Serbia and Austria
and it controlled most of these lands within
the Austro-Hungarian Empire until the end of
World War I. The Treaty of Trianon in 1920 reduced Hungary
by about two-thirds, losing Slovakia,
Transylvania and Croatia. Iceland,
as is the case with almost every island, is as big as it ever was,
controlling the entirety of its island at 103,000 square kilometers.
And Ireland's case as a fellow
island is pretty similar. It doesn't hold all of Ireland today,
but it used to before British rule.
There was a single united Ireland kingdom in the 12th century.
Its current size is 70,000 square
kilometers, but the whole island is larger at 84,000,
so I guess it did used to be a little
bigger. Italy's case is similar to Greece,
and we need to go all the way back into antiquity to a
debatable predecessor states to find the largest contrast.
Their current size is 300,000 square
kilometers. One could argue their greatest extent
was the Roman Empire at its height in the 2nd
century AD when they controlled much of Europe,
but were the Romans really a direct predecessor
of modern Italy? I think a fair comparison would
be to look at the size of the Kingdom of Italy
in the 20th century before losing their conquered land
at the end of World War II. They came to hold
Corsica, part of southern France, Istria,
Trieste, part of Dalmatia, and Albania.
And remember how Poland was eventually
partitioned among its neighbors? Well,
the next country on our list, Luxembourg, was as well.
Today, Luxembourg is pretty small,
at only 2.5 thousand square kilometers.
However, it was much larger in the 14th century as a
powerful duchy in the Holy Roman Empire.
Over three times larger, in fact, than it currently
is at over 10,000 square kilometers it eventually lost
that land to its neighbors of France, Belgium
and Germany. Malta, another island,
is also at its current and largest possible extent of 316
square kilometers. Moldova is only 33,846 square kilometers today
but the Principality of Moldavia
was larger in the middle ages,
including small parts of modern Romania and Ukraine,
essentially doubling its modern territory.
It was then absorbed into the Ottoman Empire,
Russia, Romania achieving independence at a smaller size.
Monaco was also once slightly larger
but lost land to France in agreements to remain independent.
It's only 2 square kilometers today.
Interestingly they've been using some
land reclamation techniques
and expanding further into the mediterranean ocean so
their largest extent may be yet to come.
Montenegro is another super small country at
only 13,800 square kilometers but it is as big as it's ever been.
Other instances of their existence
as a sovereign state throughout history were much smaller.
The Netherlands also had a gigantic colonial empire
but that doesn't count here. Within Europe
their greatest extent goes back to when it ruled both Belgium
and Luxembourg under the United
Kingdom of the Netherlands in 1813.
That size of 76,000 square kilometers of the entire Benelux
was then reduced to the current 41,000 after
the other two countries gained independence.
Norway is another decently sized country, 385,000 square kilometers.
One could argue their greatest
extent came at different times,
either at the Kalmar Union or the unions with Denmark and
Sweden, but Norway wasn't in charge of any of those.
And so I would say their true greatest
extent came under the medieval kingdom of Norway in the year of 1263,
when they held Greenland,
Iceland, part of the Kolde Peninsula in Russia,
as well as Northern Scotland, which brought them to
around 750,000 square kilometers.
Regarding Portugal keeping colonial empires out of this
really hinders them because we've basically had
the same border since the 13th century at a size
of 92,000 square kilometers.
I guess the most extra land we could include in Europe is the
region of Olivensa, conquered by the Spanish
and illegally held by them until today. Romania is
another pretty big country too, at 238,000 square kilometers.
However, during the early 20th century
following World War I, Greater Romania existed and was larger,
including Moldovia, Bessarabia
and a little bit of what is now Bulgaria.
It lost territories to the Germans and Soviets during
World War II, recovering some at the end of the war,
but not as many as before. Russia is already
the biggest country in the world today,
but it used to be a little bigger. The Russian Empire
used to control even more territory,
especially within Europe and also Alaska in North America.
San Marino has always had the same territory,
never increasing nor losing territory,
a super small republic of only 61 square kilometers.
Serbia, however, is a whole other story.
Similar, in fact, to our first example of Bulgaria.
Its current size is 88,000 square kilometers,
but there have been many times throughout its history
when it was bigger. You don't even have to go super far back.
In 1992, they held Montenegro
and Kosovo, but their largest extent was the Serbian Empire,
which existed in 1346, which
controlled Serbia, Macedonia, Montenegro, Albania,
and parts of Greece and Bosnia. Serbia was also a
key part of Yugoslavia from 1918 to 1992,
which was much larger than the country is today, but
other countries that were a part of it eventually gained
their own independence. Slovakia only gained
independence in modern history
and was a part of Hungary from very early on, since like
1895.
Its current size is 49,000 square kilometers
and I think it is the largest extent of the
country ever.
We can of course include Czechoslovakia too,
but it wasn't in charge of the union between
the two countries, if anything it was under Czechia's stronger rule.
And the neighboring
and similarly named Slovenia has a similar situation.
At 20,000 square kilometers,
the only larger state I could find here were the Illydian
provinces, a Napoleonic puppet state from 1809.
Its capital, Laibach, is now Ljubljana in Slovenia.
It's stretched into parts of Italy, Croatia,
and Austria, but it's a little debatable if we could
consider this a Slovene predecessor state.
It was more of a Napoleonic creation. But we're followed
by another very big example, which is Spain.
Spain is pretty big today, at half a million square
kilometers. It of course was gigantic overseas
with its colonial empire, taking up half of both
North and South America, plus Cuba,
a bunch of other islands, and the Philippines, but even in
our restricted European continent universe,
it was also quite bigger than it is now at many points.
In the year of 1600, Spain controlled
the additional territories of Portugal, the two
Sicilies, Sardinia, and additional territories in the Netherlands,
France, and Northern Italy,
all acquired mostly through dynastic unions.
Arguably even bigger than that was the empire
of Charles V a few years before in 1544,
also known typically as the Habsburg Empire which
in addition to those territories we just mentioned
also technically ruled over the entire Holy Roman
Empire with additional direct rule over Austria,
Bohemia, parts of Hungary and the entire Burgundian
Low Countries. Another great example
of territory size contrast is Sweden. Today Sweden is 450 000
square kilometers. However,
the 17th century Swedish Empire also controlled Finland, Estonia,
Latvia and even parts of Germany, Poland and Russia.
It conquered most of it during the
Thirty Years' War and then following wars with Poland
and Russia but eventually lost most of it
in the Great Northern War in 1721.
They kept Finland until 1809, then gained Norway in 1814
as a replacement, sort of, losing that too in 1905
and reaching their current size much smaller than
they used to be. Switzerland was never much bigger than it is now,
at 41,000 square kilometers, and
it's maintained stable borders since the end
of the Napoleonic Wars in 1815. However, at some
point in its existence, when it was still expanding
from the first groups of cantons which began
uniting in 1385, it did have some associate states outside
the current borders, like the French city
of Mulhouse. Plus, some
of its member states did have larger territories before, such as the
Crisson Canton which stretched into modern Italy in about 1512.
Getting close to the end of our list we have Ukraine.
Their current size is 600,000 square kilometers including
the enemy occupied territories.
Their largest extent would perhaps be the Kievan Rus
which existed between the 9th and
13th centuries and controlled much of Eastern Europe.
It was then dissolved upon the Mongol invasions,
but it might be wrong to call the Kievan Rus
as a single state, while it did kind of begin as such it
was more of an aggregation of principalities,
their total size was about 1.3 million square kilometers.
And finally, the United Kingdom.
Its current size is 243,000 square kilometers,
while the British Empire peaking in the 1920s
was the largest in history,
covering 35.5 million square kilometers, we are not including
colonial empires here.
So the greatest extent of the British Empire
within Europe would have to be when they held
all of Ireland, only briefly increasing their territory.
We could however look at England individually
and go back to the Angevin Empire in 1190
when they ruled England,
parts of Wales and Ireland and basically half of France in the
West, Aquitaine, Brittany, Normandy and a few more regions.
So that is every European country at its greatest extent.
Did you notice any mistakes
and also would you like to see any of these countries go
back to their larger size?
Let me know in the comments.
Thank you so much to my Patrons for supporting me over on Patreon.
I'm going to upload all of the maps I used
for this video to Patreon in high resolution
so I don't know, if you want to print out
a map of Serbia at its greatest extent to
put up on your wall, you can join our community there,
supporting the channel and getting
that as well.
If not, I hope you enjoyed just watching the video
and I will see you next time for more general knowledge.
Today's Moomin Cup is, I believe, a repeat.
It is this one of a girl with a pan on her head
and then she's like, she has a glowing orb
and then some buttons.
Maybe she found a palantir
and she is looking into like Sauron's head or something.
Oh, and she's holding another one.
She has like a crystal ball on one hand
And then she's just walking away
because she heard me say all of this nonsense.

