Bundesarchiv, Bild 183-19000-1918 / CC-BY-SA 3.0 [CC BY-SA 3.0 de (https://creativecommons.org/licenses/by-sa/3.0/de/deed.en)], via Wikimedia Commons

https://upload.wikimedia.org/wikipedia/commons/3/36/Bundesarchiv_Bild_183-19000-1918%2C_Albert_Einstein.jpg