The Breadalbane Brooch is a luxurious Celtic penannular brooch probably made in Ireland, but later altered and then found in Scotland. Probably dating to the 8th century, with 9th-century alterations, it is an intricately designed, silver-gilt dress fastener that is closely related to a select group of brooches that were produced in Ireland and Britain during the 'golden age' of late Celtic art. The brooch has been in the British Museum since 1919, and is normally on display.