Dentisum is the largest city on the frontier of Wesmarch and the Kalenish Principalities. Like Marchester, it was built on an old Urbiot Empire Legionary camp, and the oldest part of the city is surrounded by the old Urbian walls. It is the main terminus of the northern trail through the Dunatar Forest to the Kalenish Principalities. It is also at the junction on the western road that runs along the border and the road that leads to Pokidum.
Old Urbian walls surround the "Old City".