Cavan (; )'s the county seat of County Cavan in Ireland. The town lies in the northeast of the island, along the border with Northern Ireland. The town's located on the main road - the N3 road - linking Dublin (to the south) with Enniskillen, Ballyshannon and Donegal Town (to the north). The county's often referred to as the Breffni County. History The O'Reilly family (still a very common surname in the area) established a castle in the town in the late 13th century. A Franciscan monastery wa… (More on Cavan)