The Alba Iulia Battyaneum Library, subsidiary of the National Library of Romania, was visited in the summer of 2014 by the authors with the intent to explore the commentaries on Peter Lombard’s Sentences which are preserved in the renowned collection of this library. With the help of research tools currently available, the authors verified 21 manuscripts and identified 20 commentaries, and also 4 copies of the Sentences’ text. Overall, the authors discovered five yet unmentioned copies of commentaries. The article presents (...) the newly ascertained details on 17 manuscripts, in relation with previously known data. (shrink)