The Bann disc is an Iron Age bronze artefact that was discovered in the River Bann near Coleraine, Northern Ireland, in 1939.[1] It is a thin decorative piece emblazoned with a La Tène-style triskelion, with no obvious practical purpose. The emblem of the Coleraine Historical Society is based on the disc and its annual publication is called The Bann Disc Journal.[2] It is currently on display in the Ulster Museum.