Specialist in ancient Roman art, particularly the residue of Roman occupation of Germany and Terrasigillita. He was born in Dorpat, Russia, which is present-day Tartu, Estonia. Dragendorff wrote his dissertation under Georg Loeschcke at the university in Bonn. Director of Romans in German Commission of the Deutsche Archäologische Institut (DAI, German Archaeological Institute), 1902-1911, General Secretary of DAI (Berlin) 1911-1922. Professor of Archaeology at the University of Freiburg i.Br., 1922-. Among students inspired by his lectures in Basel were Arnold von Salis.
Westdeutschland zur Römerzeit, 1912. Arretinische Reliefkeramik mit Beschreibung der Sammlung in Tübingen, (published posthumously and edited by Carl Watzinger), 1948.
Archäologenbildnisse: Porträts und Kurzbiographien von Klassichen Archäologen deutscher Sprache. Reinhard Lullies, ed. Mainz am Rhein: Verlag Philipp von Zabern, 1988: 179-180.
- Nachlass Dragendorff, Hans, Deutsches Archäologisches Institut. https://archives.dainst.org/index.php/nachlass-dragendorff-hans, DE-2322.