By Laura Chesters
A private museum in south-west Germany has bought a portrait by Swiss artist Jean- Etienne Liotard (1702-89) from London Old Master dealer Derek Johns.
Karlsruhe Museum, in the Baden- Württemberg area of Germany, paid €1.4m (£1.2m) for the portrait of Mme Paul Girardot de Vermenoux that is signed and dated 1764.