Most structures, however, like palaces, villas, commoner's houses, and other churches and monasteries, were built of alternating layers of stone and wood. The protruding wooden support beams in these structures have been named "monkey heads" and are a staple of Aksumite architecture and a mark of Aksumite influence in later structures. Some examples of this style had whitewashed exteriors and/or interiors, such as the medieval 12th-century monastery of Yemrehanna Krestos near Lalibela, built during the Zagwe dynasty in Aksumite style.