found: Browning, O. Guelphs and Ghibellines, 2009?(OCoLC)176923976
found: Pizzaia, A.M. Musical culture of the Guelphs and the Ghibellines, 1998.(OCoLC)42415843
found: Bartlett, K.R. Florence in the age of the Medici and Savonarola, 1464-1498, 2018:p. ix (Guelfs and Ghibellines) (OCoLC)1007504023
found: Wikipedia, Dec. 9, 2020:Guelphs and Ghibellines (The Guelphs and Ghibellines (Italian: guelfi e ghibellini) were factions supporting the Pope and the Holy Roman Emperor, respectively, in the Italian city-states of central and northern Italy. During the 12th and 13th centuries, rivalry between these two parties formed a particularly important aspect of the internal politics of medieval Italy)
