This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Sayre Observatory . Sayre Observatory donated to Lehigh University by Robert Sayre Esq of South Bethlehem in In the dome of the observatory is mounted an equatorial telescope of six inches aperture by Alvin Clark Sons The west wing contains superior siderial clock by Wm Bond Sons zenith telescope by Blunt and field transit by Stackpole