ACCIAIUOLI, ANGELO. - Cardinal, born in Florence on 15 April 1340, died in Pisa on 31 May 1408 or 12 June 1409. On 3 December 1375 he was appointed by Gregory XI bishop of Rapolla, in the kingdom of Naples. In 1383 he was transferred by Urban VI to the archbishopric of Florence and in December 1384 or January 1385 was created cardinal of S. Lorenzo in Damaso. He defended Urban VI with his work *Apologeticus libellus contra Transalpinos Senatores de Urbani VI electione*.
He was of great assistance to Boniface IX, who appointed him Vice-Chancellor of the Apostolic See (1406) and archpriest of the Vatican Basilica. After having served for some time as legate in the kingdoms of Naples and Sicily, he was appointed tutor, together with Margherita of Durazzo, of King Ladislaus of Durazzo and governor of the kingdom during his minority; Ladislaus was himself crowned king by Angelo in 1390. He was entrusted with numerous and difficult legations. He upheld Ladislaus’ rights to the throne of Hungary and attended his coronation at Zara in 1403. Returning to Rome, he pacified the Orsini who had rebelled against the Pope. Innocent VII entrusted him with the reform of the monastery of S. Paolo fuori le Mura. He assisted at the election of Gregory XII but later took part in the Council of Pisa. In the 16th century his body was transferred from Pisa to the Charterhouse of Florence.