Fermanagh, former district (1973–2015), now part of district, extreme southwestern . Fermanagh also formerly was a county with the same boundaries it had as a district. It was bounded by the former districts of and to the northeast and by the republic of to the west, south, and east. Fermanagh lies chiefly in the ruggedly scenic Erne basin, which divides it into two nearly equal sections. The surface is hilly, rising to 2,188 feet (667 metres) on the southern frontier at Cuilcagh. Upper and Lower stretch from southeast to northwest, being expansions of the , which enters the district from in the republic of Ireland. in the west and from Omagh extend into northern Fermanagh, but limestone is the predominant formation.Evidence of prehistoric settlement is indicated by the megaliths and cairns scattered throughout Fermanagh. Early Celtic Christian antiquities abound, particularly on the islands in the loughs. Devenish Island, in Lower Lough Erne, is the site of an ancient monastery that has a round tower 81 feet (25 metres) high and a standing cross. During the reign of (1603–25), king of and , many English Anglicans were settled here as part of the Plantation of Ulster scheme. At Newtownbutler (now near the Irish republic’s border) in 1689, Protestants defeated the Roman Catholic army of and began the victorious tradition of the Inniskillings, now represented by two famous regiments in the ., Fermanagh is by far the least populous of Northern Ireland's six counties, with just over one-third the population of Tyrone, the next least populous county. It is approximately 120 km (75 mi) from Belfast and 160 km (99 mi) from Dublin. The county town, Enniskillen, is the largest settlement in Fermanagh, situated in the middle of the county., You’ll find County Fermanagh in the south-west corner of Northern Ireland, south of County Tyrone and west of County Armagh. The county is wrapped around Upper and Lower Lough Erne, with Enniskillen, its largest town, set right in the centre..