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(Irish: Lios Dúin Bhearna,
meaning Enclosure at the Fort by the Gap) is a spa town of 800
The town takes its name from the Irish Lios Dúin Bhearna meaning the "lios dúin", or enclosed fort, of the gap ("bhearna"). It is believed that the fort referred to in this name is the green earthen fort of Lissateeaun, which lies to the north-east of the town, near the remains of a Norman-era castle.