Towards the end of its 175th trading year, on December 8, Lempertz in Cologne is selling 23 paintings from the collection put together by the aviation entrepreneur Hinrich Bischoff, who died in 2005, and his wife, Ingrid.
The highlight is La Fillette au Braisier (Girl Blowing on a Brazier), a 2ft 6in x 1ft 10in (76 x 55cm) canvas by Georges de la Tour (1593-1652).