perpetually in progress
Sources
Brusher’s Popes through the Ages (although he often uses a portrait of one pope to portray another)
Objects and Monuments
Old Saint Peter’s
Biblioteca Apostolica Vaticana, MS. Barb.lat.2733.pt.1
108v-109r – south wall, with unlabeled, indistinguishable from one another portrait medallions
111v-112r – details of medallion frieze, still unlabeled, minimally distinguishable from one another portrait medallions
113v-114r – north wall, with unlabeled, indistinguishable from one another portrait medallions
116v & 118r – details of medallion frieze
120v-121r – west wall, with unlabeled, indistinguishable from one another portrait medallions
then beginning at 180r, portraits of popes from their tombs, accompanying drawings of their tombs and also some historical scenes – 180r Nicholas V; 180v Urban VI; 181v Innocent VII; 198r Leo I; 218v Pius III; 229v Sixtus IV; 253r Memoria for Peter by Anacletus; 254r Altar for Peter by Sylvester; 255r Paul V; 257r Leo I; 258r Gregory I
Also, papal series in San Giovanni in Laterano & San Paolo fuori le mura, plus single portraits throughout the churches of Rome
– Codex aureus of Echternach, El Escorial, Real Biblioteca, Cod. Vitrinas 17, folio 4v to 6r (1045/6)
Folio 4v: From top left corner – Peter, Linus, Cletus, Clement, Anacletus, Evaristus, Alexander I, Sixtus I, Telesphorus, Hyginus, Anicetus, Pius
Folio 5r: From top left corner – Soter, Eleutherius, Victor I, Zephyrinus, Callixtus, Urban I, Anterus, Pontianus, Fabian, Cornelius, Lucius I, Stephen I
Folio 5v: From top left corner – Sixtus II, Dionysius, Felix I, Euthychianus, Caius, Marcellinus, Marcellus I, Eusebius, Miltiades, Sylvester, Mark, Julius I
Folio 6r: From top left corner – Liberius, Felix II, Damasus, Siricius, Anastasius I, Innocent I, Zosimus, Boniface I, Celestine I, Sixtus II, Leo I, Hilary
– Missal of Ratmannus of Hildesheim, Hildesheim, Domschatz, MS. 37 (DS 37), folio 119r (1159): Left, top to bottom: Telesphorus of Rome, Sixtus I, Gelasius I, Gregory ; Right, top to bottom: Leo I the Great, Gregory the Great, Innocent I, Sergius I.
San Piero in Grado (1300) – Wikimedia Commons
North Wall, East Wall, and South Wall of the Sistine Chapel (15C), VR
Die Sixtinische kapelle by Ernst Steinmann, Tafeln
Wikimedia Commons
See also Lightbown, Sandro Botticelli.
16th Century Series of Saints and Popes by Giuseppe Franchi in the Bibliotheca Ambosiana
Basilica di Superga, Sala dei Papi (18C?) – Virtual Tour
Palazzo Colonna in Marino (1831-1846, also based on portraits once in San Paolo fuori le mura)
Nihil sub sole novum 
