 The King granted the league of river merchants a sum collected from each shipload of salt, herring, hay and grain that arrived in the city to build a new port, called de l'Ecole, where Place de l'École is today.The King also gave the corporation the power to supervise the accuracy of the scales used in the markets, and to settle minor commercial disputes.By the 15th century separate ports were established along the river for the delivery of wine, grain, plaster, paving stones, hay, fish, and charcoal.