Due to the archaic style of its first pages, it was once misattributed to saint Gregory, for example by Angelo Rocca in 1593.
The canon tables are on a double page spread at the start (the recto of leaf 1 and the verso of leaf 2), decorated with arches with floral and geometric motifs reminiscent of peacocks (symbols of the resurrection of Christ) and half-palms.
The incipit to In nomine Domini (folio 11, verso) is ornamented with a gold and silver volute initial on a green and blue background.
The following leaves beginning with Per omnia saecula and the monograms for Vere dignum and Te igitur are in gold uncial text on a purple background, surrounded by gold and silver geometric borders.
The book concludes (leaf 307, recto) with a pontifical mass dedicated to pope Sylvester II (999-1003).