Catholic-Hierarchy.org
''Catholic-Hierarchy.org'' is an online database of bishops and dioceses of the Roman Catholic Church and Eastern Catholic Churches. The website is not officially sanctioned by the Church. It is run as a private project by David M. Cheney in Ka ...
''. David M. Cheney. Retrieved June 8, 2017
Biography
On 18 March 1585, Gian Antonio Grassi was appointed during the papacy of
Pope Gregory XIII
Pope Gregory XIII ( la, Gregorius XIII; it, Gregorio XIII; 7 January 1502 – 10 April 1585), born Ugo Boncompagni, was head of the Catholic Church and ruler of the Papal States from 13 May 1572 to his death in April 1585. He is best known for ...