Understanding the Vatican: A look into the history of the Papal States
Oct 19, 2026
Vatican City, the smallest sovereign state in the world,
with an area of only 0.44 square
kilometers and a population of around 825 people.
Smallest both in size and in population,
although 18 million people visit every year,
so it tends to be quite busy. The largest building
in the world by footprint,
the Aalsmeer Flower Auction in the Netherlands, is bigger at 0.5
square kilometers. A country is smaller than this building.
It's the headquarters of Catholicism,
ruled by the Pope, who is the Bishop of Rome
and the Supreme Leader of the Catholic Church
worldwide. An elective absolute monarchy,
the Vatican mints its own Euros, prints its own stamps,
issues passports, license plates,
operates media outlets and has its own flag and anthem. But why
do they get to be a specific sovereign state?
This is something we don't see for other religions,
at least that I know of.
It mostly has to do with the power and importance of Christianity,
the Pope and the Holy See itself throughout history I will focus
on the Vatican as a state
in this video and not very much in the religious aspect
that would be a whole other topic so in
this video I want to try
and understand one how the papacy came to exist in the first place and
how it established itself in Rome
and the Vatican two how it gained power and influence from the
pope's role as the king of kings in the medieval times
to the great control that the papal states
had over part of Italy and three how it lost much
of that influence power and territory especially
but how it remained sovereign and obviously still powerful
and influential even if with much less
dimension creating the Vatican City as we know it today
this is a little bit of a longer video so I
divided it into nine chapters you can check
the description for timestamps if you just want to
skip ahead to any of them the name Vatican
was already in use in the time of the Roman Republic
for the Ager Vaticanus, an area of marshes
on the west bank of the Tiber River across from the city
of Rome. It was uninhabited, but as time went on,
Roman emperors began draining the waters and
building there, and it is in the Roman Empire that its origins lie.
When a great fire leveled much
of Rome in the year 64, Emperor Nero,
seeking to shift blame from himself, accused the Christians
of having caused it. Many of them were burned and crucified,
one of which being Saint Peter,
supposed disciple of Jesus
and leader of the apostles as well as being the first bishop of
Rome. Emperor Caligula then built gardens and circuses in this area,
adding the famous Vatican
Obelisk, ordering it to be brought
from Egypt where it had been built for Pharaoh over 3,000
years ago. In 1586, it was moved to the center
of the square where it is today. And for its first
300 years within the Roman Empire,
the church was persecuted and unrecognized, unable to hold
any territory of its own.
Only by the 4th century, with the official recognition of the Christian
religion in Rome, Emperor Constantine began construction
of the original St. Peter's
Basilica on top of his supposed ancient burial ground,
and granting property and power to the
Pope, one of which being the Lateran Palace in Rome,
which became the official papal residency
for over a thousand years.
But at this time, Catholicism wasn't fully dominant yet, and many
pagan shrines coexisted with the Basilica in the area of the Vatican.
For example, a shrine that
to the Phrygian goddess Cybele.
With the adoption of Catholicism by the
Roman Empire, the Pope and Catholic
Church gained power and influence in the
region, which also became more populated
with the building of the Basilica.
Eventually the Roman Empire fell
and the papacy was put under control of the
Byzantines, the Ostrogoths, the Franks and many others.
But regardless of who was
technically in charge of them
and the entire territory, their power grew in
in Rome and in Italy.
In 756, the Donation of Pepin provided a legal basis for the creation
of the Papal States, extending the rule
of the Popes beyond the Duchy of Rome. Pepin was a
Frankish king who took over northern Italy
from the Lombards with the support of the Papacy,
then rewarding this support with territory.
A few years later, in 781, Charlemagne officially
established which regions the Pope would control.
The Duchy of Rome, Ravenna, the Duchy of the
the Pentapolish, parts of the duchy of Benevento,
Tuscany, Corsica, Lombardy, and a number of Italian
cities. Although it seems in practice,
the popes were unable to exercise effective sovereignty over
the extensive and mountainous territories of these papal states,
and the region preserved its old
system of government, with local counts
and marquises ruling small areas, but owing allegiance to the
pope. In exchange, in the year 800,
Pope Leo crowned Charlemagne as emperor of the Romans,
setting the roots for the Holy Roman Empire.
Now, this is all very simplified, and each of
these events has complicated historical details
that I won't get into here, but what it seems to
sum up to is the power of the Pope,
derived from Catholicism's expansion throughout Europe,
both during and after the fall of the Roman Empire.
The people were vastly Catholic,
and they recognized the Pope as their religious leader through
the Catholic Church. Because of
this, military rulers and kings seeked the support
of the Pope in order to have the support of the
people, and in exchange for this support,
they allowed the papacy to exist as its own state,
granting it more power and territory.
Next were the times of the Holy Roman Empire.
It's somewhat unclear what the relationship between
the empire and the papal states were,
and three options are put forward.
One, the papal states were a separate state from the empire,
having full sovereignty. Two, they were a part of the empire,
administering their own territory,
but recognizing imperial sovereignty,
even if this did not please them. Or three, the Holy
Roman Emperor ruled Christendom,
with the Pope being only directly responsible for Rome and
spiritual duties. The correct answer might be all of them.
The HRE existed for centuries and its
relationship with the papacy changed
and existed in many forms throughout that time, depending on
what was going on, which emperor and which pope ruled,
amongst other things. The Holy Roman Empire
in its Frankish form collapsed
and was subdivided among Charlemagne's grandchildren. Imperial power
declined in Italy at this time
and the papacy's prestige declined as well. This led to a rise in
the power of the local Roman nobility
and the temporary control of the papal states by a
powerful and arguably corrupt aristocratic family, the Theophylacti.
This temporary period was later
called as the Saeculum Obscurum, the Dark Age.
If the fall of the Roman Empire had brought
instability to Rome, the fall of Charlemagne's empire did as well.
But soon enough, a new
invader would bring about more change.
In the 10th century, the Germanic conqueror Otto invaded
North Italy and once again sought the approval
of the Pope with compensation. Pope John XII
crowned him emperor and the two of them ratified
the Diploma Ottonianum by which the emperor became
the guarantee of independence of the Papal States.
But throughout the following years,
as the rulers of the Holy Roman Empire changed,
the empire and the papacy had various conflicts
when it came to who effectively ruled the papal states and Rome.
This was only solved with the
Treaty of Venice in 1177.
This was a peace treaty between the papacy, the Lombard League, and
Frederick I, Holy Roman Emperor.
It followed Frederick's defeat at the Battle of Legnano and
brought about the end of the conflict between them.
The conflict was so big at this point that
the emperor had nominated an anti-pope
who challenged the actual pope's authority and
claimed it as its own. The treaty fully established
the independence of the papal states and by 1300
many of the other Italian principalities
also achieved their sovereignty from the empire.
After establishing its independence from the Holy Roman Empire
and consolidating its power over
Italy to the vast papal states,
the papacy was able to replace their conflict with the Germans
with a new rival, France.
Because of a conflict with the French crown, French King Philip IV
arrested Pope Boniface VIII.
When his successor, Benedict XI, died, the French king forced a
deadlock, conclave, to elect a French cardinal, Clement V, as pope.
This was in 1305. Clement
refused to move to Rome, and in 1309,
he moved the papacy to the papal exclave at Avignon,
where it remained for the next 67 years.
We can see the exclave here on this map. The city was
officially part of the papal state's territory,
which was reasonably large at this point. Avignon
Avignon actually remained a papal possession
for around 400 years, even after the popes
returned to Rome until it was seized
and incorporated into France during the French Revolution.
A total of seven popes reigned at Avignon,
all French and all under the influence of
the French crown.
And this papal absence almost led
to the collapse of the papal states in Italy.
Local despots began to take advantage
of the absence of the popes to establish themselves
as the rulers in the papal cities even more than before.
And it seems that throughout the existence
of the Papal States, the papacy's effective
rule over cities and lands was always questionable.
They mostly decided who ruled them in their name,
save some exceptions, while effective rule was done locally.
But the Church was still present
and they saw these local despots as threats to the papal sovereignty,
so they rallied armies
and were able to re-establish papal sovereignty
and even pave the way for a more direct control.
Here is how. Six books of law,
essentially the first Papal State's constitution in 1357. And
under it, the Papal States were divided into five provinces.
The Duchy of Spoleto, the March
of Ancona, Romagna, the Patrimony of Saint Peter,
and the Campania and Maritime Provinces. Each of them
fell under the direction of a rector,
appointed personally by the Pope, and this ended the mosaic
of local rule, which saw its climax during the Avignon Papacy.
Only by 1376 did Gregory XI
finally move back to Rome, but by this time,
the Papal States were once again solid, and even more
in control of their Italian land.
The papal constitution seeked to enforce more direct
papal control over the papal states, but it wasn't very successful.
The rectors were appointed by the
pope, but local rules sometimes still fell under
the control of local princes from noble families.
Only in the 16th century did
the pope obtain full direct control over its territories. However,
despite all their issues with the French
and with the HRE over who controlled Rome,
they always held important power throughout all
of the Christian kingdoms of Europe.
Christianity brought with it the idea of anointed kings,
meaning kings that had the Catholic Church's
stamp of approval. This approval was ultimately decided by the Pope.
For instance, Portugal was
only officially an independent kingdom
when it was recognized by Pope Alexander III as such in 1179.
They also held the right to excommunicate people,
including kings, removing their religious approval
of their rule. During the Renaissance,
the papal territory expanded even more, especially under
popes Alexander VI and Julius II.
The pope became one of Italy's most important rulers, not only as
head of the church, but also as a ruler of a powerful state,
politically and militarily. In
the 16th century alone, they were involved in three major wars,
and Pope Julius II was known
as the warrior pope. The conflict with the Holy Roman Empire
also made a comeback, if it was ever
really gone. In 1527, Emperor Charles V sacked Rome
and imprisoned Pope Clement VII. Because of
this, the Pope was forced to give up Parma, Modena,
and several smaller territories, even though they
did recover some of them later on.
At its greatest extent in the 18th century, the Papal States
included most of central Italy, Latium, Umbria,
March, and the legations of Ravenna, Ferrara,
and Bologna, extending north into Romagna.
And then came Napoleon, to mix everything up as he
did everywhere else in Europe.
In 1796, the French invaded Italy and seized Papal territories in the
North, which became part of the Cisalpine Republic.
But the French Empire under Napoleon invaded again
in 1808. In this time, the remainder
of the Papal States were annexed to France, forming the
Departments of Tiber and Trasimène of the French Empire.
Finally, with the fall of the Napoleonic
system in 1814, the Congress of Vienna officially restored
the Italian territories of the Papal
States, with it regaining its full independence,
being internally divided into 17 apostolic
delegations, which were then grouped up into five major ones,
Romagna, Marche, Umbria, Marittima
and Campana, and Lazio. It seemed that finally,
the Pope's power over central Italy was consolidated,
organized, and validated by an international agreement.
But after issues with the Germans
and the French came a conflict within Italy itself.
Italian patriotism had been rising
during the Napoleonic period,
and while the Congress of Vienna that followed Napoleon's fall
mostly restored the old borders of Italy's kingdoms,
along with the papal state's borders,
the desire for unification was not gone.
In fact, in 1849, a Roman Republic was declared,
and Pope Pius IX had to flee the city.
Until it was retaken with French help, the papal states
were temporarily ruled by a group of cardinals called
the Red Triumvirate. But stability did
not return with the return of the Pope to Rome.
Throughout all of Italy, wars were waged between
the kingdoms, monarchies were overthrown by Garibaldi,
and the people themselves began to
revolt as they had done in Rome.
In 1860, much of the land was already in rebellion against papal
rule and Sardinia-Piedmont conquered the eastern two-thirds
of the papal states. While considerably
reduced, the papal states nevertheless still controlled
the Latium region, but not for long.
The unified kingdom of Italy was declared in 1861,
with Rome being declared the capital of
the new kingdom. However, the new Italian
government could not take possession of the
city because a French garrison still protected the Pope.
But, in 1870, the French went to war
with Prussia and had to recall their garrison
which opened the door for Italian annexation
of the capital. The Pope refused
and so Italy declared war and besieged Rome, reaching the
Aurelian Walls, built by Emperor Aurelian in 271.
The city was captured soon after. Rome and what
was left of the Papal States was annexed
to the Kingdom of Italy after a referendum and this
marked the end of the Papal States as a sovereign state.
The Italians attempted to integrate the
Holy See into Italy, putting forth a law
of guarantees that assured certain rights and
powers to the papacy. But the Pope refused again,
claiming they were independent and would not
submit to a foreign powers law.
The Holy See confined itself in the Apostolic Palace on
Vatican Hill, the official residence of the Pope up to today.
It was only in 1929, almost 60 years
later, that this issue was resolved through the Lateran Treaty.
The treaty recognized Vatican City
as an independent state, under the sovereignty of the Holy See,
not to be integrated with Italy.
the Italian government also agreed to give
the Roman Catholic Church financial compensation for
the loss of the Papal States' territory.
This brought peace between the two states and the
needed stamp of approval of the Catholic Church
to the Italian regime at the time. Just like with
Charlemagne or Otto, the Pope seems to once again have reached
an agreement with an external ruling
power in exchange for its internal sovereignty.
The Papal States had practically ceased to exist
in 1871, and on paper, they came to an end here in 1929.
1173 years after the donation of Pepin
in 756, which first extended their rule outside of Rome,
the Holy See was once again confined to
the city, but to an even smaller territory than the ancient duchy,
now only Vatican Hill. The
Vatican City State was officially created as we know it today.
So, after understanding how the
papacy was created, how it gained and lost power throughout time,
how the papal states were created
as well and how they existed, then coming to an end,
giving place to the Vatican City. How does
it work? Like I mentioned in the beginning,
the Vatican is a theocratic absolute elective monarchy.
This means that a religious figure, the Pope,
is the absolute ruler, elected by a college of
cardinals, a rare case of non-hereditary monarchy,
where the ruler is chosen after the death or
resignation of the previous Pope.
When two-thirds of the cardinals select a new candidate, he chooses
is named and becomes Pope,
the leader of the Vatican State and the Holy See. But how do these
to differentiate themselves from each other.
The term Holy See refers to the composite of the
authority, jurisdiction, and sovereignty vested in the Pope
and his advisors to direct the worldwide
Catholic Church. It is therefore distinct from the Vatican City State,
which merely represents
the territory. For instance,
papal diplomats are diplomats of the Holy See. The Vatican has no
diplomatic representation itself.
When it comes to the administration of the territory, power is
divided, as usual, into three branches, executive,
legislative, and judicial. The Pope technically
holds all power, according to the law of the Vatican City State,
but in reality he only
exercises his power through other organs
and people that act on his behalf. Legislative
authority is given to the Pontifical Commission,
a congress of seven cardinals appointed by the
Pope in five-year terms. Laws passed
by the Commission must be approved by the Pope through
the Secretariat of State prior to being published and taking effect.
The Secretariat of State is
like a government, presided by a cardinal secretary of state,
the equivalent to a prime minister,
who is also nominated by the Pope.
And when it comes to judicial authority, it is exercised
through the Supreme Tribunal of the Apostolic Signatura.
However, under the terms of Article
22 of the Lateran Treaty, Italy will,
at the request of the Holy See, punish individuals for
crimes committed within the Vatican.
They also have no prison system, so people convicted of
crimes in the Vatican serve their term in Italian prisons,
with the cost being covered by the
Vatican itself. Military-wise,
they are a neutral nation ever since the Lateran Treaty, only having
two internal forces, the Swiss Guard,
which seeks to guard the Pope, commanded by the Holy See
itself, and the Gendarmerie,
which essentially act as the Vatican State's police. Two additional
forces existed, the Palatine Guard and the Noble Guard,
infantry and cavalry, formed in 1850 and
1801 respectively. These were active during
the symbolic resistance to the Italian Siege of Rome,
they remained in existence after the establishment of the Vatican,
but were disbanded in 1970 in the
war-waging times of the Papal States and warrior popes are long gone.
An interesting fact about
the Swiss Guard is that it was initially established
as a mercenary force. They have
been protecting the Pope ever since 1506
when Pope Julius II hired one of the Swiss mercenary
forces for his personal protection.
They use the Euro as their currency, being part of the Eurozone
and mint their own coins with figures of the Church.
The Vatican City is one of the few
widely recognized states that has not become
a member of the United Nations. The Holy See,
which is, like we saw, distinct from the Vatican State,
has permanent observer status with all the
rights of a full member except for a vote in the General Assembly.
So, that is a very brief
explanation of the history of the Vatican and how it works,
how the papacy and the Holy See came to
exist and how the state has also existed besides it,
starting as the Duchy of Rome, under the
control of the Pope, establishing itself as the Papal State,
suffering various territorial changes
and even occupations, until eventually reforming itself
as the Vatican City State as it is today.
Thanks so much for watching this video,
subscribe if you want and leave a comment if you noticed
any mistakes or have any additional information about this.
I will see you next time for more
general knowledge.

