St. Paul, basilica of, sacked by Saracens, 73; in Jubilee of 1300, 147, 148. St. Peter, basilica of, described, 55, 56; sacked by Saracens, 73; enclosed in walls, 74; in Jubilee, 147; held by the Guelfs, 159; plan to rebuild, 252; rebuilt, 289, 290; dome completed, 344; colonnade, 351. St. Peter Damian on lay investiture, 87. St. Sophia, church of, 38. St. Theresa, 345. St. Thomas Aquinas, 178, 179. St. Zeno, church of, in Verona, 194. Salerno, 70, 92, 104. San Gallo, da, Antonio, the younger, 290. San Gallo, da, Francesco, account of discovery of Laocoon, 291. San Gallo, da, Giuliano, 244, 289, 290, 291. Sansovino, Jacopo Tatti, 306, 311. Saracens, 40; conquests of, 41; in Sicily, 73; in Italy, 73. Sardinia, conveyed to Savoy, 341; dukes of Savoy become kings of Sardinia, Kingdom of, see Piedmont. Sarpi, Paolo, Fra, 337, 338. Sassoferrato, 352. Savonarola, 248, 258-262. Savoy, 172 (see also Piedmont); its situation and princes, 173; becomes duchy, 229; during wars between Francis I and Charles V, 296; becomes an Italian state, 296; in 17th and 18th centuries, 343. Savoy, House of, 173. Scala, della, House of (the Scaligers), 194-198; burial place of, 196. Scala, della, Can Grande, 195, 196; aided by Henry VII, 198. Scala, della, Mastino, 196, 197; his defeat, 197, 198. Scaligers, see Scala della, House of. Scarlatti, Alessandro, 358. Scarlatti, Domenico, 358. Schism, the Great, 218-220. Sebastiano del Piombo, 312. Segnatura, Stanza della, 290. Sella, Quintino, 413. Sforza, House of, becomes extinct, 257, 258. Sforza, Alessandro, lord of Pesaro, 250. Sforza, Attendolo (Muzio Attendolo), 222. Sforza, Francesco, 222; becomes Duke of Milan, 250; dealings with humanists, 250; death, 253. Sforza, Galeazzo Maria, 254, 255. Sforza, Lodovico, il Moro, 255-257, 281. Sicilian Vespers, 162. Sicily (see also Two Sicilies), practically Greek, 42; Norman conquest, 93; under Henry VI, 114; under Frederick II, 141, 142; under Charles of Anjou, 161, 162; Sicilian Vespers, 162; under House of Aragon, 162; about 1350, 201; appanage of Aragon, 223; no share in Renaissance, 249; under legitimate branch of House of Aragon, 263; under Spanish viceroys, 294; conveyed to Savoy, to Austria, to Spanish Bourbons, 341; prior to 1789, 364; loses its autonomy, 368; in 1848, 386, 390; revolution put down, 391; expedition of Garibaldi and Mille, 403. Siena, conquered by Florence, 294; visited by Montaigne, 327. Sigismund, Emperor, 220. Signorelli, 288. Silvester, Pope, legend of, 45-47. Simony, movement against, 86. Sistine Chapel, 288; Michelangelo's frescoes, 290. Sixtus IV, Pope, 270, 271, 286. Sixtus V, Pope, 344. Sodoma, 309. Solferino, 400.