Pavilion of Large Refractor

Pavilion of Large Refractor ″Carl Zeiss″ 650/10550 mm of Belgrade Observatory, built 1932.

From Wikimedia Commons (Art Deco › Art Deco by country › Art Deco architecture by country › Art Deco buildings by country › Art Deco buildings in Serbia › Belgrade observatory). By Свифт/Svift. CC BY-SA 3.0.