 The side of the Tagliamento River, which flows near the town, was too strategically important to leave it without any form of control, so the Patriarch assigned Walterpertoldo from Spilimbergo to control the area.In 1273 he did a great restoration to the buildings near the river, in order to effect the best form of control against invasion.These works, however, did not modify the structure of the town, that has the castle in its centre and the other buildings are situated around it.