Pope Leo XII
E170667
Pope Leo XII was the head of the Catholic Church and ruler of the Papal States from 1823 to 1829, known for his conservative policies and efforts to restore traditional Church authority after the Napoleonic era.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Pope Leo XII canonical | 6 |
| Leo XII | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1442075 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Pope Leo XII Context triple: [Pope Pius VII, successor, Pope Leo XII]
-
A.
Pope Gregory XVI
Pope Gregory XVI was the head of the Catholic Church from 1831 to 1846, known for his staunch conservatism, opposition to modern liberal movements, and resistance to technological innovations like railways in the Papal States.
-
B.
Pope Pius VII
Pope Pius VII was the head of the Catholic Church from 1800 to 1823, best known for his complex relationship with Napoleon Bonaparte, including his role in restoring the Church’s position in France and his later imprisonment by the French emperor.
-
C.
Pope Pius IX
Pope Pius IX was the 19th-century head of the Catholic Church whose long pontificate saw the loss of the Papal States and the proclamation of papal infallibility.
-
D.
Pope Leo XIII
Pope Leo XIII was the head of the Catholic Church from 1878 to 1903, known for his influential social encyclical *Rerum Novarum* and his strong promotion of Marian devotion and the Rosary.
-
E.
Pope Leo XI
Pope Leo XI was a briefly reigning 17th-century pope, known for his very short pontificate of just 27 days in 1605.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Pope Leo XII Target entity description: Pope Leo XII was the head of the Catholic Church and ruler of the Papal States from 1823 to 1829, known for his conservative policies and efforts to restore traditional Church authority after the Napoleonic era.
-
A.
Pope Gregory XVI
Pope Gregory XVI was the head of the Catholic Church from 1831 to 1846, known for his staunch conservatism, opposition to modern liberal movements, and resistance to technological innovations like railways in the Papal States.
-
B.
Pope Pius VII
Pope Pius VII was the head of the Catholic Church from 1800 to 1823, best known for his complex relationship with Napoleon Bonaparte, including his role in restoring the Church’s position in France and his later imprisonment by the French emperor.
-
C.
Pope Pius IX
Pope Pius IX was the 19th-century head of the Catholic Church whose long pontificate saw the loss of the Papal States and the proclamation of papal infallibility.
-
D.
Pope Leo XIII
Pope Leo XIII was the head of the Catholic Church from 1878 to 1903, known for his influential social encyclical *Rerum Novarum* and his strong promotion of Marian devotion and the Rosary.
-
E.
Pope Leo XI
Pope Leo XI was a briefly reigning 17th-century pope, known for his very short pontificate of just 27 days in 1605.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
Pope
ⓘ
human ⓘ |
| appointedApostolicNuncioTo |
Bavaria
ⓘ
France ⓘ Switzerland ⓘ |
| appointedArchbishopOf | Tyre ⓘ |
| birthDate | 1760-08-22 ⓘ |
| birthName | Annibale Francesco Clemente Melchiore Girolamo Nicola Sermattei della Genga ⓘ |
| birthPlace |
Genga
ⓘ
Marche region ⓘ
surface form:
Marche
Papal States ⓘ |
| burialPlace | St. Peter's Basilica ⓘ |
| concernedWith |
education under Church control
ⓘ
restoration of religious life after the French Revolution ⓘ |
| countryOfCitizenship | Papal States ⓘ |
| createdCardinalBy | Pope Pius VII ⓘ |
| dateOfCardinalate | 1816-03-08 ⓘ |
| deathDate | 1829-02-10 ⓘ |
| deathPlace |
Papal States
ⓘ
Rome ⓘ |
| electedPopeOn | 1823-09-28 ⓘ |
| endTime | pontificate 1829-02-10 ⓘ |
| familyName | Sermattei della Genga ⓘ |
| givenName | Annibale ⓘ |
| heldTitle |
Cardinal Vicar of Rome
ⓘ
surface form:
Vicar of Rome
|
| honorificPrefix | His Holiness ⓘ |
| issuedDocument |
encyclical Charitate Christi
ⓘ
encyclical Ubi primum ⓘ
surface form:
encyclical Quo graviora
encyclical Ubi primum ⓘ
surface form:
encyclical Quod hoc ineunte
encyclical Ubi primum ⓘ |
| knownFor |
conservative policies
ⓘ
efforts to restore traditional Church authority after the Napoleonic era ⓘ promotion of clerical discipline ⓘ reassertion of papal temporal authority in the Papal States ⓘ support for religious orders ⓘ |
| languageOfWorkOrName |
Italian
ⓘ
Latin ⓘ |
| memberOf | College of Cardinals ⓘ |
| motto | In humilitate ⓘ |
| papacyNumber | 252 ⓘ |
| papalName |
Pope Leo XII
self-linksurface differs
ⓘ
surface form:
Leo XII
|
| policy |
opposition to liberalism
ⓘ
reinforcement of censorship ⓘ restriction of press freedom in the Papal States ⓘ strengthening of the Inquisition in the Papal States ⓘ |
| positionHeld |
Pope
ⓘ
surface form:
Bishop of Rome
Head of the Catholic Church ⓘ Sovereign of the Papal States ⓘ |
| predecessor | Pope Pius VII ⓘ |
| religion |
Roman Catholicism
ⓘ
surface form:
Catholic Church
|
| startTime | pontificate 1823-09-28 ⓘ |
| successor | Pope Pius VIII ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Pope Leo XII Description of subject: Pope Leo XII was the head of the Catholic Church and ruler of the Papal States from 1823 to 1829, known for his conservative policies and efforts to restore traditional Church authority after the Napoleonic era.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Leo XII