  To date there is no reliable information on Petrizi’s dates and biography. According to older Georgian research, he lived in the second half of the 11th century and the first half of the 12th century. More recent research, however, tends to date him to the second half of the 12th century. The state of research is aggravated by the lack of information on Petrizi. The little personal information that is known about him stems from remarks scattered through his works in which Petrizi briefly speaks about himself. In his Proclus commentary—the Interpretation of the Elementatio theologica of Proclus—and in the Postscript, which is traditionally ascribed to him, the author mentions his own cares and problems.