 It is recorded that in 1298 he composed a monophonic office for the royal palace chapel at Paris, and that in 1301–2, he resided at the court of the Bishop of Amiens, undoubtedly as a member of his clerical staff, and most likely his chapel staff as well.Petrus died before 1347, since in that year is the first reference in the inventory of Amiens Cathedral to its possession of a polyphonic manuscript which he had apparently left them in his will.Contemporary and slightly later commentators spoke well of Petrus de Cruce; no less than the theorist Jacobus de Liėge called him, "that worthy practical musician, who composed so many beautiful and good pieces of mensural polyphony and followed Franco’s precepts."