Carmarthen is the county seat of Carmarthenshire in south Wales. It lies on the Towy River eight miles from Carmarthen Bay and is 35 miles northwest of Swansea. Originally built on the site of the Roman Station, features of interest include a ruined Norman castle and a 13th century church (St Peter').
Because of its location, Carmarthen was an important river port and a busy trade center during the Middle Ages. Its importance declined after the industrial revolution.