Parallel to the Bassin des Marchands runs the Rue de Flandre - Vlaamsesteenweg, for centuries a street of traders. In the south the street ends at the Place Sainte-Catherine. Here, the Bassin Sainte-Catherine was situated (1564). After covering the dock in 1853, a new church was built (1854-1873), dedicated to Sainte Catherine. The ancient architecture of the quays is preserved on the north side of the square with façades from the 17th and 18th centuries.