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| Leopold Vietoris on his 110th birthday| Mathematisches Institut Oberwolfach (MFO), https://opc.mfo.de/detail?photoID=4343| Konrad Jacobs, Erlangen| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 2.0 de' align='center' link='https://www.austria-forum.org/cc/by-sa-20.html' target='_blank'}]| Datei:Vietoris4343.jpg
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