Pope Sixtus IV
Documents 4
4 bulls
- 5 June 1475 Bull Cum rationis — On the reform of the University of Avignon
- 29 August 1475 Bull Quemadmodum operosa — Reducing the Jubilee year to a 25-year interval
- 4 September 1483 Bull Grave nimis — On the Immaculate Conception condemning those who call it heretical
- 9 May 1484 Bull Quoniam nonnulli — On the authority and letters of the Major Penitentiary