The Trinity College harp, also known as "Brian Boru's harp", is a medieval musical instrument on display in the long room at Trinity College Dublin in Ireland. It is an early Irish harp or wire-strung cláirseach. It is dated to the 14th or 15th century and, along with the Queen Mary Harp and the Lamont Harp, is the oldest[1] of three surviving medieval harps from the region.[2] The harp was used as a model for the coat of arms of Ireland and for the trade-mark of Guinness stout.