This dungeon is commonly referred to as the 'Family Crest dungeon' since it is usually used for the Family Crest quest.
Besides this quest, the main attraction is the two hellhounds in the central room. To get into this room you will need to pull a number of levers. At the north wall, pull the lever down. Then, go to the south wall; there are two doors. Enter the room and pull the lever down. Head back to the north wall and pull the lever up. Enter the visible room and pull the closest lever down. Leave this room and pull the next lever down. Go into the south room to pull that lever up.