Columbia subject headings:
Harvard subject headings:
Astronomical instruments--Byzantine Empire.
Astronomy, Byzantine.
Clocks and watches--Technological innovations--Byzantine Empire.
Mechanical engineering--Technological innovations--Byzantine Empire.
Technology--Byzantine Empire.
Princeton subject headings:
Astronomy, Byzantine--Technological innovations.
Clocks and watches--Byzantine Empire--Technological innovations.
Mechanical engineering--Byzantine Empire--Technological innovations.
Technology--Byzantine Empire.