Onorato Caetani, XIV Duke of Sermoneta and IV Prince of Teano (18 January 1842 – 2 September 1917) was an Italian politician from the noble Caetani family.^[1]

He was born in Rome, which was then part of the Papal States, to Michelangelo and Calixta Caetani (née Rzewuska). He graduated in law at the University of Rome in 1863 and lived for a long time in England.

A supporter of the Historical Right party, he took a moderate position which gained the respect of both Catholics and non-Catholics.

He was elected for Velletri to the Chamber of Deputies in March 1872 and remained there uninterruptedly until 1911, when he was appointed to the Upper House as a Senator of the Kingdom of Italy. He also served as the 8th Mayor of Rome from December 1890 to November 1892, and from March to July 1896 as Minister of Foreign Affairs of the Kingdom of Italy in the Government of Rudini II.

Caetani was elected president of the Italian Geographical Society in 1879 in succession to Cesare Correnti, the society's founder, who had been forced to resign for pursuing political objectives. He held the office until 1887, restoring the society's scientific objectives, promoting the teaching of geography in schools and organising the 3rd International Congress of Geography in Vienna in 1881.

• Knight Grand Cordon of the Order of Saints Maurice and Lazarus
• Commander of the Order of the Crown of Italy

He died in Rome, Italy in 1917. In 1867, during his time in England, he had married Ada Constance Bootle-Wilbraham, daughter of Colonel the Hon Edward Bootle-Wilbraham (a son of Edward Bootle-Wilbraham, 1st Baron Skelmersdale). Their children included the Islamist Leone Caetani (1869–1935), the composer Roffredo Caetani (1871–1961) and the diplomat Gelasio Caetani (1877–1934).

• This article contains material from the equivalent article on Italian Wikipedia