Restormel Castle. Antique print of Restormel Castle which lies by the River Fowey near Lostwithiel in Cornwall, England. It is one of the four chief Norman castles of Cornwall, the others being Launceston, Tintagel and Trematon. Antique copper-plate engraving dated in the plate Nov 6th 1786. Size of engraved area approx 5x6ins. .