Muiredach's High Cross is a high cross from the 10th or possibly 9th century, located at the ruined monastic site of Monasterboice, in 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 is the most impressive surviving example of early medieval Irish stonework, and the crosses at Monasterboice have been said to be Ireland's greatest contribution to European sculpture. Background: high crosses in Ireland Irish high crosses are internationally recognised icons of early medieval Ireland. They are usually found on early church sites and can be either plain or decorated. High crosses served a variety of functions including, liturgical, ceremonial, and symbolic uses. They were also used as markers for an area of sanctuary around a church; as well as focal points for markets, which grew around church sites. The "greatest", or "classic", Irish high crosses can be found at Durrow Abbey, the Abbey of Kells, and at Monasterboice. These high crosses are decorated with panels inscribed with biblical themes; and are thought to be influenced from late antiquity and early medieval Rome. Such 'classic' high crosses comprise the largest corpus of biblical sculpture in all of Europe, in the last quarter of the first millennium CE. The sculpted panels are thought to have been originally painted, though no traces of paint survive today. On such high crosses, the east face tends to show scenes from the Old Testament and the Book of Revelation; while the west face shows scenes from the New Testament. High crosses can be dated from the inscriptions they bear; and it is difficult to date the majority of the plain and undecorated high crosses. The earliest Irish high crosses, at Kinnity, County Offaly, have been dated to 846–862 CE. Both Muiredach's cross and the Cross of the Scriptures at Clonmacnoise have been dated to about 900–920 CE. High crosses are thought to have originated as stone versions of decorated wooden or metal crosses; and the stone crosses which survive today are considered to be the last phase of development of the high cross. Early forms are thought to have been made of wood, with ornamented panels of bronze sheeting; and would have been much smaller than the grand high crosses which survive today. Irish high crosses are considered to have been derived from stone crosses in Britain, where they