The picturesque old harbor (Vieux-Bassin), lined with 16th-18th century townhouses, has been the frequent subject of Claude Monet and other artists. It's located on an estuary where the Seine river meets the English Channel. A block up from the harbor is St Catherine's Church, made of timber wood and built by shipbuilders in 15th century. Today the block around the church is the important location of "market day"!
