Byzantine sundial-cum-calendar, 5th-6th century
The most exceptional feature of this sundial-cum-calendar is its sheer antiquity. The four fragments are all that remain of a portable sundial combined with a calendar driven by gears.

Byzantine sundial-cum-calendar, 5th-6th century

The most exceptional feature of this sundial-cum-calendar is its sheer antiquity. The four fragments are all that remain of a portable sundial combined with a calendar driven by gears.