Dibella's Watch adds an entire new continent to Oblivion. It comes complete with a major city, castles, towns, villages, farms, monasteries and all the good stuff that makes up a Medieval landscape. There's also fighting to be had and quests to be made!
Castle St. Graecius is the base of a Crusader detachment in the western Deadlands. Their task is to fight the bandits and barbarians, but recently they haven't done so well though. Beta 05 is released tomorrow.