County Laighean (in English, County of Leinster) or Laighin, is the second county established in Ireland. It opened its shores to immigrants 27 January, 1457. Laighean originally consisted of four towns; Cill Chainnigh, a forest town, An tInbhear Mór, a lake town, Ceatharlach, a lake town, and Loch Garman, a lake town. Ceatharlach and Loch Garman were taken during the Laighean civil war, becoming part of An Mumhain County for sometime and were then returned to Laighean County. Loch Garman has since been closed and Port Láirge and An Caiseal have become part of the county.