Columbia subject headings:
Astronomy, Ancient.
Astronomy, Medieval.
Astronomy.
Dante Alighieri, 1265-1321--Knowledge and learning.
Early maps.
Harvard subject headings:
Astronomy, Ancient
Astronomy, Medieval
Dante Alighieri, 1265-1321--Knowledge and learning.
Dante Alighieri, 1265-1321--Knowledge--Astronomy.
Early maps.
Princeton subject headings: