 of Saarwerden moved the Rhine toll castle from Neuss upstream to Zons protecting it with walls and moats and granting Zons the town privileges in 1373.At the centre of the fortress was the thick fortified Friedestrom Castle which served the administration and protection of the toll and housed the administration of the new parish Zons.The obviously planned building of the toll fortress with town walls was finished probably in the 15th century.