Quirinus Harder

{{Short description|Dutch architect (1801–1880)}}

Quirinus Johan Harder (13 October 1801, in Rotterdam – 21 October 1880, in VlissingenW. Burgers (1997): Ontwerper van de ijzeren lichttorens. Levensbericht van Quirinus Harder (1801-1880) in Erfgoed van Industrie en Techniek.[https://www.wiewaswie.nl/nl/detail/print/29851272 Quirinus Harder on WieWasWie.nl]) was a Dutch architect best known for having designed a large number of lighthouses. He worked as a structural engineer for the Loodswezen, the Dutch organization overseeing all maritime pilots. Harder's lighthouses were made of cast iron, a new material at the time, which allowed for segmented fabrication and construction.{{cite book|last=Molen|first=S.J. van der|title=Onze Wadden eilanden|url=https://books.google.com/books?id=PBDm29XhdDcC&q=%22Quirinus+Harder%22|year=1983|publisher=Publiboek/Baart|isbn=978-90-6513-093-8|page=85}}