Round tower, rising over 30m (110 feet) tall. It was originally divided into four or more stories inside, connected with ladders. As with other round towers in Ireland, this was used as a belfry, watch-tower, and a refuge for monks and valuables during times of Viking attack. Records indicate that the interior went up in flames in 1097, destroying many valuable manuscripts and other treasures. The tower is currently closed to the public. Monasterboice, Ireland.