Paul Bonatz (6 December 1877 – 20 December 1956) was a German architect, member of the Stuttgart School and professor at the technical university in that city during part of World War II and from 1954 until his death. He worked in many styles, but most often in a simplified neo-Romanesque, and designed important public buildings both in the Weimar Republic and under the Third Reich, including major bridges for the new autobahns; in 1943 he went to Turkey, where he also designed several buildings, returning to Stuttgart in 1954.
Bonatz was born in Solgne, Alsace-Lorraine, then German Empire. In 1900, he finished his studies of architecture at the Technical University of Munich. He trained under Theodor Fischer, but unlike Fischer, did not join the Nazi party, and had actually briefly belonged to the SPD. After building several major buildings during the Weimar Republic, notably the Stuttgart Hauptbahnhof (main station, 1913–1927), after the Nazis came to power he became architectural expert and advisor to Fritz Todt, the general inspector for German road building, and in this position built major bridges for the new Reichsautobahn system and with Hermann Giesler worked on the design for a planned new main station for Munich.