County An Mumhain (Munster) was the first county created in Ireland. It opened its shores to immigrants 21 March, 1456. Initially it consisted of three towns; An Caiseal, an orchard town, Lios Mór, a forest town, and , Port Lairge, a lake town. On 24 April 1456, An Mumhain expanded, adding Luimneach, a lake town, Imleach, a forest town, and Ros O'g Cairbre, a lake town. Corcaigh was added in early 1457, a second orchard town. On 21 April 1457, An Mumhain expanded again, receiving two new towns: Cill Chaoi, a lake town and Inis, an orchard town.