How to recover the Holy Land : the crusade proposals of the late thirteenth and early fourteenth centuries /

by Leopold, Antony, 1972-
Published 2000

The Historia pontificalis of John of Salisbury /

by John, of Salisbury, Bishop of Chartres, d. 1180
Published 1986

The papal monarchy : the Western church from 1050 to 1250 /

by Morris, Colin, 1928-
Published 1989

Reform and the papacy in the eleventh century : spirituality and social change /

by Cushing, Kathleen G.
Published 2005