Columbia subject headings:
Harvard subject headings:
Authors, Italian--To 1500--Correspondence
Dante Alighieri, 1265-1321. Correspondence.
Dante Alighieri, 1265-1321. Divina commedia.
Latin letters, Medieval and modern--Translations into Italian.
Scala, Cangrande della, 1291-1329.
Princeton subject headings:
Dante Alighieri, 1265-1321--Authorship.
Scala, Cangrande della, 1291-1329.