Giambattista Rubini was born in
Venice in 1642, the second son of Donato Rubini and Cristina Medici. His grandmother, Cristina Ottoboni, was the sister of
Pope Alexander VIII. He was educated at the
University of Padua, becoming a
doctor of both laws. He became a
canon of
Padua Cathedral at an early age. After law school, he moved to
Rome to become
Referendary of the
Apostolic Signatura. He later became governor of the cities of
Fabriano,
Spoleto,
Frosinone,
Viterbo, and
Macerata. He then went on to be governor of the
Campagne and Maritime Province,
Umbria, and the
March of Ancona. Rubini received the
minor orders on 10 September 1683; became a
subdeacon on 12 September 1683; and was made a
deacon on 19 September 1683. He was
ordained to the
priesthood on 21 September 1683. On 15 May 1684, the
cathedral chapter of
Vicenza Cathedral elected him to be
Bishop of Vicenza. He was
consecrated as a
bishop by Cardinal Alessandro Crescenzi on 21 May 1684. == Cardinalate ==