Frankfurt, Stadtbibliothek, 68
Selected Canon Law Collections, ca. 500–1234
"Frankfurt, Stadtbibliothek, 68" is sometimes said to be a copy of Gratian, Concordia discordantium canonum. The reference should probably be to Frankfurt, Universitätsbibliothek, Barth. 68, a copy of Omnibonus' Abbreviatio decreti..