Columbia subject headings:
Architecture, Medieval--Italy--Genoa.
Architecture.
Bridges--Turkey--Istanbul--Design and construction--History.
Leonardo, da Vinci, 1452-1519--Knowledge and learning.
Harvard subject headings:
Architecture, Medieval--Italy--Genoa.
Bridges--Turkey--Istanbul--Design and construction--History.
Leonardo, da Vinci, 1452-1519--Knowledge--Architecture.
Princeton subject headings:
Architecture, Medieval--Italy--Genoa.
Bridges--Turkey--Istanbul--Design and construction--History.
Leonardo, da Vinci, 1452-1519--Knowledge--Architecture.