In 1985 he completed his studies with a master's degree and received his doctorate in 1987 in Bonn under Nikolaus Himmelmann with a thesis on the subject of magnificent mythological reliefs from the imperial era.
In addition to his teaching activities, Lehmann has been heading the Archaeological Museum of the Martin Luther University Halle-Wittenberg since 2007, succeeding Manfred Oppermann.
A questionable bronze portrait of the first Roman emperor (2014), Goethe's very dearest Klytia - Metamorphoses of a Woman Bust (2016), The Discovery of Ancient Painting in the 18th Century: Turnbull - Paderni - Winckelmann (2017) and Ideale.
This was followed by a legal dispute between Max Kunze and the Winckelmann Society on the plaintiff's side and Stefan Lehmann as the defendant.
[4] In 2012, Lehmann made a public, written affidavit in which he regretted the as-conceived defamatory attacks against Kunze and the Winckelmann Society.
[5] On March 8, 2012, the Naumburg Higher Regional Court confirmed in the last instance the conviction of Stefan Lehmann for the omission of the allegations against Max Kunze and the Winckelmann Society.
[8] This publication was also immediately noted by the international specialist community and, as the reviews can show, lively scientifically discussed.