OPERA, rise of the, in Florence, ii. 341.

ORANGE, Prince of, leader of the Spanish army in
  the siege of Florence, i. 18.

ORATORIO (Musical), the: 
  its origins in Rome, ii. 334.

ORATORY of Divine Love, the, i. 76.

ORSINI, the, reduced to submission to the Popes, i. 7.

—–­Paolo Giordano (Duke of Bracciano): 
  his passion for Vittoria Accoramboni, i. 358;
  his gigantic stature and corpulence, 359;
  poisons his first wife, 360;
  treatment by Sixtus V., 363;
  secret marriage with Vittoria, 364;
  renounces the marriage, 365;
  ratifies the union by public marriage, 366;
  flight from Rome, ib.: 
  death of the Duke, 367.

—–­Prince Lodovico: 
  procures the murder of Vittoria Accoramboni and her brother, i. 368;
  siege of his palace, 370;
  his violent death, 371.

—–­Troilo, lover of the Duchess of Bracciano, i. 360;
  details of his murder by Ambrogio Tremazzi, 405 sqq.

OSIO, Gianpaolo: 
  his intrigue with Virginia de Leyva, i. 318 sqq.;
  murders her waiting-woman, 322;
  attempts to murder two other nuns, 324;
  his letter of defence to Cardinal Federigo Borromeo, 326;
  condemned to death and outlawed, 327;
  terms of the Bando, 328;
  his end, 329.

OSORIO, Don Alvaro, Grand Marshal of Spain, i. 22.

OUTLAWRY in Italy in the sixteenth century, i. 307 sqq.

OXFORD, Giordano Bruno’s reception at, ii. 144.

P

PACHECO, Cardinal, the foe of the Caraffeschi, i. 105.

PADUAN school of scepictism, the, influence of, on Tasso, ii. 20.

PAGANELLO, Conte, assassin of Vittoria Accoramboni, i. 371.

PAINTING in the late years of the sixteenth century, ii. 344;
  Eclecticism, 345;
  influence of the Tridentine Council, 347;
  the Mannerists, 348;
  Baroccio, 349;
  the Caracci, 350 sqq.;
  studies of the Bolognese painters, 352;
  academical ideality, 354;
  Guido, Albani, Domenichino, 355 sqq.;
  criticism of Domenichino’s work, 359;
  the Italian Realists, 363 sqq.;
  Lo Spada, 364;
  Il Guercino, 365;
  critical reaction against the Eclectics, 368;
  fundamental principles of criticism, 370 sqq.

PAIX des Dames, i. 9, 16.

PALAZZO Vernio, Academy (musical) of the, ii. 340;
  distinguished composers of its school, 341.

PALEARIO, Aonio: 
  his opinion of the Index, i. 197, 214.

PALESTRINA, Giovanni Pier Luigi: 
  his birth and early musical training, ii. 323;
  uneventful life of the Princeps Musicae, 324;
  relations with the Congregation for Musical Reform, 325;
  the legend and the facts about
  Missa Papae Marcelli, 326 sqq.,