A complete MS of mass music, the main corpus of which is written in Gothic script. The interpolated section is in a much larger script. The only polyphonic work is the two-part Kyrie from Vatican mass V. This appears on f. 8, the first page of the Kyriale. The incipit of the two invocations of the polyphonic Kyrie given in the MS is identical with ETw 44 3.
204-230 of the leaves were interpolated c. 1480-1500.