Astronomischer Universalsonnenring

3D Collection – a Universal Sun Ring for Telling the Time

This universal sun ring comes from the former collection of Rudolf Wolf (1816-1893). Wolf’s inventory dating from 1873 does not state clearly whether the universal sun ring was incorporated into the Wolf collection as a purchase or a donation. An improvement of the hanging sundial … Read more


3D Collection – a Theodolite by Georg Friedrich Brander

This 18th century theodolite is part of the Observatory Collection. It was created by Rudolf Wolf (1816-1893). He was a professor of astronomy, head of the Semper Observatory, director of the library of the Polytechnic (present-day ETH) and collector of astronomical instruments. He created an … Read more