| Boncompagni | |
|---|---|
 Coat of arms of Boncompagni family | |
| Country |  Papal States  Kingdom of Naples
Duchy of Sora  Kingdom of Italy |
| Founded | 1133 |
| Founder | Rodolfo Boncompagni |
| Titles | |
| Deposition | 1796 (from Sora) 1801 (from Piombino) |
| Cadet branches | Boncompagni-Ludovisi |
The House of Boncompagni is a princely family of the Italian nobility which settled in Bologna in around the 14th century, but was probably originally from Umbria.[1]
In 1572 Ugo Boncompagni was elected pope, taking the name Gregory XIII, and the family prospered. In 1579, the pope bought the Duchy of Sora from the Della rovere family for his son Giacomo, whose descendants reigned there as dukes until 1796. Later they also obtained the Principality of Piombino, following the marriage of Gregorio II Boncompagni with Ippolita Ludovisi, princess of Piombino and last of her dynasty. They reigned over Piombino as Boncompagni-Ludovisi, until Antonio II Boncompagni Ludovisi was deposed as Prince of Piombino in 1801;[1] the heads of the family, though no longer reigning, continued to be known as "Prince [forenames] Boncompagni Ludovisi" as of 2023.[2]
- ^ a b "BONCOMPAGNI e BONCOMPAGNI-LUDOVISI in "Enciclopedia Italiana"". www.treccani.it (in Italian). Retrieved 2021-10-23.
- ^ Giuffrida, Angela (14 January 2023). "US-born princess vows to stay in Rome villa despite eviction order". The Guardian.