This map from the V.B. Strassen-Atlas von Deutschland, 1938, found on the website of Randall Bytwerk, shows Frankfurt's configuration just before the war, including some streets named after Hitler, Göring, etc. In sector B1, NW of center, see the "Aussichts-T. Sportpl." just north of the Farben building; this was to become the Frankfurt High School athletic field. You can also see it in this 1950 aerial photograph