Joseph Massol was a French architect, mainly active in Strasbourg. He is notable for continuing Robert de Cotte's work on the bishop's palace in the city between 1728 and 1729, as architect to the bishop and the cathedral chapter. He produced designs for the hôtel de Klinglin for the royal prefect François-Joseph de Klinglin, but de Klinglin was dissatisfied with them and instead had it built by the city architect Jean-Pierre Pflug, though probably drew on Massol's plans. In 1758 Massol also built a wing (known as the 'aile d'intendance') and a new entrance gate for the hôtel de Klinglin, both now de