Antique sundial

Antique sundial
Antique sundial
Antique sundial
Antique sundial
Antique sundial
Antique sundial
Antique sundial
Antique sundial

Antique bronze clock in the shape of an astrolabe. The intersections of metal arcs form a model of the celestial sphere, where the positions of the equator, ecliptic and horizon are schematically depicted. Greek astronomers Hipparchus and Ptolemy used a similar model for their observations. Belgium, early twentieth century.