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“Lupus duplex: Frederick II, Gregory IX, and the ‘Widowed Churches’ of Sicily.”

Year: 
2010
Researcher(s): 
John P. Lomax
Institution: 
Ohio Northern University
Discipline: 
History
Monumenta Iuris Canonici, Series C: Subsidia, 14 (Città del Vaticano, 2010), 207-225.