In the port the horses were used to transport freight. There they were called nation horses. They drew the ships in canals and rivers. Along most of the canals still lies a towpath. That was the path for the horses. They were also used in the coal mines where they entered as a foal and never more came out because they became too heavy and so they could no longer be up hoisted.
After the second world war these splendid heavy horses were repressed by the motorization.