The cappa of the Lateran basilica worn by the canons of Westminster cathedral, or the almuce worn, by concession of Pope Pius IX., by the members of the Sistine choir.
Thus in the 37th of the so-called "Canons of Hippolytus" we read: "As often as the bishops would partake of the Mysteries, the presbyters and deacons shall gather round him clad in white, quite particularly clean clothes, more beautiful than those of the rest of the people."
The season was soon after Easter; the year may be safely deduced from the fact that the first nine canons are intended to repair havoc wrought in the church by persecution, which ceased after the overthrow of Maximinus in 313.
Archbishop Unwan of Hamburg-Bremen (1013-1029) substituted a chapter of canons for the monastery, and in 1037 Archbishop Bezelin (or Alebrand) built a stone cathedral and a palace on the Elbe.
Jerome and Photius call the work Ecclesiastical Canons, but this seems to be a mistake.