The pride of this museum is its impressive collection of almost 100 portraits by Quentin de la Tour, who lived and died in Saint-Quentin (1704-1788). It also features paintings and sculptures from the 17C-20C, most notably the poignant triptych by André Devambez, a secular reflection on the Great War, and the pieces by Amédée Ozenfant, founder of Purism with Le Corbusier.