Leonardo da Vinci, Pathfinder of Science
Bubonic plague   Plants, study of, 79, 80   Platonic school, 54   Pliny, 23   Plutarch, 81   Pollaiuolo, 53   Ponte Vecchio, 31   Pontine marshes, 139, 154   Pope Alexander VI, 82, 92, 102   Pope Innocent VIII, 63   Pope Julius II, 124, 127, 128, 130, 131   Pope Leo X, 130-132, 139, 142-146, 153   Pope Sixtus IV, 21, 33   Porta del Popolo, 129   Porta Romana, 29   Porta Vercellina, 79, 115   Porto Cesanatico, 94   Portugal, 26   Predis, Bernardino de, 47   Predis, Giovanni Ambrogio de, 43, 44, 47, 56   Ptolemaic theory, 48   Ptolemy, 23, 54, 103                                       Q   Queen Claude, 152                                       R   Raphael, 107, 131, 137   Ravenna, battle of, 127   Red Book of the Painters of Florence, 19   Reflection, law of, 56   Renaissance, 89, 104, 125, 161   Riario, Girolamo, 21, 38   Rimini, 93   Rome, 9, 33, 47, 69, 128-146   Romorantin, 150, 152   Rosate, Ambrogio da, 63   Rumford, 56   Rustici, Giovanni, 118                                       S   "St. Anne with the Virgin and Child," 91, 92   St. Augustine, 42   Saint-Denis church, 157   St. Germain-en-Laye, 157   Saint-Hubert, chapel of, 153, 157   St. John, 118, 154   St. John the Baptist, 151   St. Luke, 19   St. Mary of the Virgin, 96   St. Peter's, church of, 131   Salai, 86, 115   Salviati, Francesco, 21   San Bernardo, chapel of, 23   San Cristoforo, 157   San Donato a Scopeto, 29   San Lorenzo, 144, 145   San Marco, Little Square of, 87   Sanseverino, Galeazzo da, 82, 83   Sant' Onofrio, hospital, 107   Santa Croce, church of, 107   Santa Maria delle Grazie, 71, 78   Santa Maria Novella, 107   Sanzio, Raffaello, _see_ Raphael   Savoy, 142   Scarlione, Bartolommeo degli, 43   Sculpture, 41, 49, 52-54, 58-64, 118   Sforza, Duke Gian Galeazzo, 51, 56, 68, 120   Sforza, Francesco, 41, 47, 49, 61, 64   Sforza, Francesco (child), 68   Sforza, Ludovico, 33-47, 51, 52, 56, 57, 60-72, 76-79, 82-84, 92,           115, 117, 120, 138, 146, 154   Sforza monument, 49-59, 61, 64, 120   Sforzas, the, 40, 56, 57, 71, 79, 83, 117, 120, 154   Shells, 62, 63   Signoria, the, 96, 100-106, 110, 114, 116   Sistine Chapel, 33, 132, 137   Soderini, Piero, 103, 106, 109, 114-116   Sologne, 154   Spain, 18, 69, 127, 139, 142, 143   Statics, 140   Steam, 41   Strabo, 23, 103, 104   Swiss, 127, 128, 143                                       T   Ticino gate, 44   Torre, Marcantonio della, 125, 128   Toscanelli, Paolo del Pozzo, 18, 19, 42, 93   Touraine, 92   Trivulzio, Marshal Gian Giacomo, 120, 121, 125, 128, 143   Turks, the, 87-90, 94   Tuscany, 93   Tyrrhenian coast, 143                                       U   Uffizi Gallery, 25, 32   University of Padua, 125   University of Pavia, 63   Urbino, 93                                       V   Valentinois, Duke of, _see_ Borgia, Cesare   Valois, Marguerite de, 150   Vatican, the, 47, 130-145   Venice, 9, 69, 87-89, 124, 125, 127   Verrochio, Andrea del, 7, 12-19, 23, 118   Via Ghibellina, 90   Vigevano, 68, 75   Vinci, 2, 13   Vinci, da, Giuliano, 117   Vinci, da, Piero, 2-7, 10, 12, 90, 106, 117   "Virgin of the Rocks," 44   Vitellozzo, 93   Vitruvius, 77                                       W   Water, study of, 67, 101, 102, 121, 122   Watt, James, 160   Witelo, 58                                       Y   Yugoslavia, 88