Fosset. Fosset is a hamlet in the Belgian commune of Sainte-Ode located in the Walloon region in the province of Luxembourg. It is crossed by the Laval, a stream which is a tributary of the Western Ourthe. A three-arched bridge over Laval, locally called a Roman bridge. Built in the 19th century, it was drawn and painted several times by the famous symbolist Fernand Khnopff who took his holidays in Fosset. Restored in 1996, it is no longer used for traffic. This bridge has become the emblem of the merger between 3 former municipalities into the new municipality of Sainte-Ode with which it adorns the municipal coat of arms.