Château Deganne, Casino and convention center in Arcachon, France.

Château Deganne is a neo-Renaissance château on the seafront at Arcachon, built in 1853 and modelled on the Château de Boursault in Champagne. Its pale cream and grey stone facade carries the lettering "CASINO" and "CENTRE DE CONGRES" beneath a steep dark grey roof with dormers, a central spire and a taller pointed turret at each end. A raised stone terrace with a colonnade projects at the centre, two rows of windows cross the front below a long balcony, and low wings extend to both sides.

The château was built during the 19th century when Arcachon expanded as a seaside resort along the Atlantic coast. It represents the development of entertainment establishments that emerged during this period in French coastal towns.

Adalbert Deganne held lavish receptions here, including one for Adolphe Thiers in 1875 and another for President Patrice de Mac Mahon in 1877. He also assembled a large collection of paintings in the salons, bought mainly at the Paris and Bordeaux Salons. Since 1977, after the Mauresque casino burned down, this has been Arcachon's only casino.

The château stands on the beachfront of Arcachon, in the Gironde department, and now houses the town's casino and convention centre. Visitors reach it on foot along the seafront; the photograph shows parked cars in front of the facade. It is the only casino in Arcachon since the Mauresque casino burned down in 1977.

The château combines three distinct functions under one roof: gaming establishment, event venue, and meeting space within a single Renaissance structure. This versatility allows the building to serve different visitor groups simultaneously.