Portable Cylindrical Sundial

Image of a portable cylindrical sundial made from bone. The sundial has two parts: the hollow cylinder and an insertable plug housing the gnomon, which can be rotated to project at a right angle to the cylinder for use or be contained within it for storage.

Portable Cylindrical Sundial

Medium:: Bone

Dimensions:: H. 6.2 cm; Diam. 2.5 cm

Context:: Tomb of the Physician, Este, Italy

Date:: 1st century CE

Inventory Number:: IG MNA 15397

Lender:: Museo Nazionale Atestino di Este

Credit:: Museo Nazionale Atestino di Este

© Institute for the Study of the Ancient World / Guido Petruccioli, photographer