The Annibaldi are the pope's in-laws, a Roman house that will grow great in the thirteenth century on the Alban hills and in the Marittima.
On 1 January 1200 none of their later castles can be pinned to them; what is sure is the marriage tie to Innocent III and their place in the pope's party.
Who he is
- Name
- Annibaldo (the elder), married to a sister of Innocent III [date of the marriage and his standing on 1 January 1200 not pinned]
- Title
- Roman magnates, kin by marriage of the pope
- Since
- Not pinned
- Born
- Not pinned
- Family
- it.wikipedia makes the family kin by blood of Innocent III, Gregory IX and Alexander IV; Riccardo Annibaldi, the later cardinal (1237), was born about 1210
- Confidence
- low
it.wikipedia (Annibaldi): Annibaldo the elder married a sister of Innocent III and became senator (no date). The page's castles (Molara, Rocca Priora, Monte Porzio, Rocca di Papa, Monte Compatri, Sermoneta, Ninfa, Terracina, Genzano, Cori) are given without dates, and its tale of a dowry of 1090 is not reliable. The DBI on Riccardo Conti says the Conti held the lands between Circeo and Sora together with the Annibaldi, their kin by marriage (a later state of things).
Gregorovius: Pietro Annibaldi, a papal ally, built a tower near the Colosseum (in the troubles after 1203).
Overlord
The commune, and through it the pope.
What it holds
- Houses in Rome near the Colosseum (the tower by the Colosseum is built after 1203)
- Castles in the Alban hills and the Marittima: not pinned for 1200
Allies and rivals
Allies: the Conti. After 1202 they back one faction in Terracina against the Ceccano's.
How things stand that morning
In the pope's party; holdings not pinned.
Threats
- The fall of the pope's party in Rome
Places of note
- Annibaldi houses: By the Colosseum, where Pietro Annibaldi builds a tower after 1203
Where the sources disagree
Evidence: Only the marriage to the pope's sister is reasonably sure; nothing dates their castles to 1200.
On the map: No ground is drawn: their castles are later.
Primary sources for Rome
Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.
- Annals of Montecassino; Annals of Ceccano (Fossanova) (12th and early 13th centuries; Ceccano to 1217). Two sets of annals from either side of the papal and Sicilian frontier. Read online
- Chronicle of Richard of San Germano, Richard of San Germano (first version about 1216, enlarged to 1243). The fullest southern narrative of the Hohenstaufen kingdom, written by a notary on the border of the Terra di Lavoro. Read online
- The Deeds of Innocent III, Anonymous (a curial official, perhaps Peter of Benevento) (about 1208 to 1209). The curia's own account of the pontificate's first decade, with letters copied in. Read online
- The Book of Census of the Roman Church, Cencius Camerarius (Cencio Savelli, later Pope Honorius III) (1192, with later additions). The papal rent roll: every church, monastery, town and kingdom that owed a census to Rome in 1192, diocese by diocese, with the sums, followed by lists of papal lands and castles, the ceremonial Ordo and copies of charters. Read online
- The Registers of Pope Innocent III for 1199 to 1201, Innocent III and the papal chancery (22 February 1199 to 21 February 1201). The pope's outgoing letters for the year, in his chancery's own copy, touching nearly every realm in the atlas. Read online
Sources and studies
- Annibaldi (it.wikipedia)
- Riccardo Conti (Treccani, Dizionario Biografico)
- F. Gregorovius, Storia della città di Roma nel medio evo, vol. 5
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.