historyarchaeologyartefacts:Combined Nocturnal (used to tell the time based on the stars movements)
historyarchaeologyartefacts:Combined Nocturnal (used to tell the time based on the stars movements) and horary quadrant (a form of portable sundial) by Eufrosino della Volpaia. Its one of the earliest scientific instruments to be signed and dated by its maker. Florence, Italy. 1516 AD. [1194x1280] -- source link