Aksumite Architecture flourished in the region from the 4th century BC onward, persisting even after the transition of the Aksumite dynasty to the Zagwe in the 12th century, as attested by the numerous Aksumite influences in and around the medieval churches of Lalibela. Stelae (hawilts) and later entire churches were carved out of single blocks of rock, emulated later at Lalibela and throughout Tigray. Other monumental structures include massive underground tombs often located beneath stelae.