Ardboe High Cross (Irish: Seanchrois Ard Bó) is a high cross and national monument located in Ardboe, County Tyrone, Northern Ireland. It was the first high cross built in Ulster. This cross is about 18.5 feet (5.6 m) high and 3.5 feet (1.1 m) wide. It depicts twenty two panels of Old and New Testament scenes. The cross stands at the entrance to a cemetery and a monastery and a church from the seventeenth century which was founded in 590 by Saint Colman. The monastery was destroyed by fire in the twelfth century. The name "Ard Boe" means "hill of the cow" it comes from a weird legend that the monastery of Ardboe was built from the milk of a magic cow out of Lough Neagh. It is believed to have been erected in either the ninth or the tenth century and forms the only remaining part of an early monastery on the site. At around 18.5 feet (5.6 m), Ardboe High Cross is Northern Ireland's tallest cross.