The Karl-Schwarzschild-Observatorium (Karl Schwarzschild Observatory) is an astronomical observatory originally founded in 1960 as an affiliated institute of the former Deutsche Akademie der Wissenschaften zu Berlin and named in honour of the astronomer and physicist Karl Schwarzschild. In 1992, the institute was refounded as Thüringer Landessternwarte (TLS, Thuringian State Observatory) ’Karl Schwarzschild’ Tautenburg.