Siena, [171], [172], [177-179], [243-245], and passim.

Sismondi of Pisa (family), [280].

Sizii (family), [80], [124].

Soldanieri (family), [81], [124].

Susinana, Maghinardo da, [298-299].

Sylvester, Pope, [38-40].

Tagliacozzo (battle), [233-240].

Tancred I., king of Sicily, [89-91].

—— II., [112-113].

Telofre, king of the Lombards, [49-51].