Person Helbing, Hermann male Permanent URL https://www.proveana.de/en/link/act10004259 last updated 26.02.2021 Show sources Hide sources Basic information Basic information Ortsbezug Wirkungsort Show sources Deutschland, Frankfurt am Main Getty, GeoNames Research reports Works acquired by the “Drawings Collection” (formerly at the Nationalgalerie)…16.03.2017 Area of activity Area of activity Buchhandel Show sources Teilhaber und Betriebsinhaber des Antiquariats Joseph Baer & Co.(bis mind. 1932) Joseph Baer & Co., Buchhandlung und Antiquariat Research reports Works acquired by the “Drawings Collection” (formerly at the Nationalgalerie)…16.03.2017 References References Research projects Project reference Works acquired by the “Drawings Collection” (formerly at the Nationalgalerie) during the period 1933 to 1945 and their provenances