Born 1978 in Graz, Nierhaus studied art history and history in Vienna. He has lectured at the University of Vienna's Department of Art History since 2004. From 2005 to 2008 he was a research associate at the Commission for Art History of the Austrian Academy of Sciences. Since 2008 he is curator of the architectural collection at the Vienna Museum. His research focus is on architecture and fine art from 19th to 21st century, as well as architecture and mediality. Most recently published: Otto Wagner (2018). His current book published by Residenz Verlag: Otto Wagner - Meine angebetete Louise (2019, jointly edited with Alfred Pfoser).