Bibliography
Gerhart B. LADNER, « Die Statue Bonifaz' VIII. in der Lateranbasilika und die Entstehung der dreifach gekrönten Tiara », Images and Ideas in the Middle Ages. Selected studies in History and Art, 1, Roma, Edizioni di Storia e Letteratura, 1983 (Storia e Letteratura. Raccolta di Studi e Testi, 155), p. 393-426 : fig.
Gerhart B. LADNER, Images and Ideas in the Middle Ages, Selected studies in History and Art, 1
p. 393-426 : fig.
Etude
Book section
ICO. X 1282 (8°)
Recueil d'articles de G. Ladner.