The whole subject is exhaustively treated by Father Joseph Braun in Die liturgische Gewandung (Freiburg im Breisgau, 1907).
BREISGAU, a district of Germany, in the grand duchy of Baden.
The Breisgau, originally a pagus or gau of the Frankish empire, was ruled during the middle ages by hereditary counts.
Of Za,hringen in 1218, his coheiresses brought parts of the Breisgau to the counts of Urach and Kyburg, while part went to the margraves of Baden.
At the close of the 13th century the Kyburg part of the Breisgau passed to the Habsburgs, who in 1368 acquired also the town and countship of Freiburg, which had been sold by the counts of Urach to the Freiburgers and given in pledge by them to the house of Austria in exchange for a loan of the purchase price, which they were unable to repay.