[1] Pietro Martire Giustiniani was born in Chios, Greece in 1645 and ordained a priest in the Order of Preachers.
[2][3] On 10 December 1691, he was appointed during the papacy of Pope Innocent XII as Archbishop (Personal Title) of Tinos.
[1][2][3] On 13 January 1692, he was consecrated bishop by Galeazzo Marescotti, Cardinal-Priest of Santi Quirico e Giulitta, with Giuseppe Bologna, Archbishop of Capua, and Stefano Giuseppe Menatti, Titular Bishop of Cyrene, serving as co-consecrators.
[2] On 10 May 1700, he was appointed during the papacy of Pope Innocent XII as Bishop of Tinos.
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