Muiredach's High Cross is a high cross from the 10th or possibly 9th century, located at the ruined monastic site of Monasterboice, County Louth, Ireland. There are two other high crosses at Monasterboice; in local terms Muiredach's cross is also known as the South Cross. Muiredach's cross has been described as the most beautiful specimen of Celtic stonework now in existence; and the crosses at Monasterboice have been stated to be Ireland's greatest contribution to European sculpture.