After surviving the First World War, Lacasse became a successful painter of figurative scenes illustrating the condition of the working classes, often depicted against a religious background.

Following a trip to South Italy in 1921, where he painted his ‘motherhood’ series, always in a style of emphasized realism, he decided to enroll at the Académie Royale des Beaux-Arts, Brussels where Lacasse met his future wife, Stephanie Lupsin, daughter of the renowned art dealer.

Throughout the thirties, Lacasse turned to Abstraction for consolation from the disillusionment over the painting and the forced removal of his frescoes at the Dominican Chapel at Juvisy during 1931-32.

The gallery played an important role on the Parisian art scene with exhibitions showing the works of many including Jacques Lipchitz, Moïse Kisling, Francis Picabia and Pablo Picasso.

[2] At the outbreak of the Second World War, Lacasse decided to join General de Gaulle’s Resistance by moving to London with the Free French Forces.