Brecknock Museum & Art Gallery is a museum managed by Powys County Council in Brecon, the historic county town of Brecknockshire or Breconshire in Mid Wales. Built off Captain's Walk, The Watton in 1824 as a shire hall, the building later functioned as an assize courts until its closure in 1971, re-opening in 1974 as a museum. One of Brecon's most significant pieces of architecture, the building has been Grade II* listed since 1952. The Brecknock Society and Museum Friends are closely associated with the museum.