Land of Legends
Albus Porta was built during the Second Age to guard a bridge linking two landmasses across a bay. They come within a mile of touching at this point and so it was possible to build a bridge to span the gap and create a link from one to the other at this point. Albus Porta in turn was used by the Western lands to guard against the Eastern ones. Oddly enough the bridge has had to rebuilt three times in it’s history, but the original fortress at Albus Porta has survived and a town has ground around it.