Public domain
The Olympieion, in the background the Acropolis of Athens
From the collection of Kunstmuseum Basel. Free to download, adapt and use — no permission needed.
Credit lineDas Olympieion, im Hintergrund die Akropolis von Athen. Friedrich Horner (1800–1864). Kunstmuseum Basel, Kupferstichkabinett, Prof. Rud. Handmann-Horner-Stiftung. Public domain.