Sigismund of Tyrol, cousin of Maximilian, [123].
—— of Poland, [446].
Signory, Florentine executive, [26], [458].
Silvestro, Fra, executed with Savonarola, [32].
Simonetta, counsellor of Bona of Savoy, murdered by Ludovico ‘Il Moro,’ [8].
Sinigaglia, massacre of, [53].
Sixtus V., [270];
disapproval of League, [428];
excommunicates Henry of Navarre, [429].