In the Middle Ages Odsherred was fortified with the construction of the castle of Dragsholm (Dragsholm Slot), situated just there where the land between the peninsula and the rest of Zealand was most narrow. The castle was the property of the pontiff in the town of Roskilde, and created both the basis for farming and for defending of Odsherred. The strategical position of the castle can only hardly be seen today, since the Lammefjord is now dry and therefore does not create a natural border for troops on land, but the castle itself is still both visible and inhabitable, even though the appearance has been changed over the years.