His wife Gisela M. A. Richter and their daughters Irma and Luise Marie Schwaab were also art historians . His wife Gisela M. A. Richter and her daughters Irma and Luise Marie Schwaab were also art historians .
Isterinya Gisela M. A. Richter dan anak perempuan mereka Irma dan Luise Marie Schwaab juga merupakan ahli sejarah seni. Isterinya Gisela M. A. Richter dan anak perempuannya Irma dan Luise Marie Schwaab juga merupakan ahli sejarah seni.