Franz Josef Denzinger (24 February 182114 February 1894) was a German architect and church builder. His works include numerous churches, including in Regensburg and Frankfurt am Main. He was born in Liège as the son of a university philosopher Ignacio Denzinger and Marie Thekla née Molitor. The family moved to Würzburg in 1831, where the son attended grammar school and then studied "general" sciences at Julius Maximilians University, where his father taught as a full professor. From 1842/43 he studied engineering at the Royal Polytechnic Academy in Munich, as well as architecture at the Academy of Fine Arts. In 1846 he completed his training with the state examination as an engineer for the state building service for road, bridge and hydraulic engineering, in 1847 supplemented with the examination as an architect for civil engineering.