BOURBON L'ARCHAMBAULT, town, central France, department of Allier, on the Burge, 16m. W. of Moulins by rail. Pop. (1931) 1,852. There are thermal springs known since Roman times, a church (12th century), and ruins of 'a castle of the dukes of Bourbon (13th and I 5th centuries), including a cylindrical keep. Stone is quarried in the vicinity. Bourbon (Aquae Bor vonis or Bormonis) was anciently the capital of the Bourbonnais and gave its name to the great Bourbon family (q.v.). The affix Archambault is the name of one of its early lords.