In the Netherlands windmills named "torenmolens" (tower mills) have a compact-built, cylindric or only slightly conical tower. In the southern Netherlands four mills of that type (Dutch definition) survived, the oldest one built before 1441. The cap of three of those mills is turned by a luffing gear built in the cap. Older types of the tower mill could be found on castles, fortresses or city walls with a fixed cap since the 14th century, and are still be found around the Mediterranean Sea. They were built with the sails facing the prevailing wind direction.