sea-green glaze, and white crystalline fragments with an uncracked green-white glaze. Some Ming dynasty ware was also discovered, including many early Ming blue-and-white bowl sherds. They were adorned with tendril scrolls on a bluish ground and ornamented with black spotting, while other bowls had floral patterns outlined by grey or black-blue designs. Additionally, a few Ming red-and-white sherds were found, as well as white porcelain fragments with bluish highlights. The Adal sites appeared to reach an Indian Ocean terminus at the Sa'ad ad-Din Islands, named for Sultan Sa'ad ad-Din II of the Ifat Sultanate. Additionally, local tradition identifies the archaeological site of Tiya in central Ethiopia as Yegragn Dingay ("Gran's stone") in reference to Imam Al-Ghazi. According to Joussaume (1995), who led archaeological work there, the site is relatively recent. It has been dated to between the 11th and 13th centuries CE. Tiya contains a number of megalithic pillars, including anthropomorphic and non-anthropomorphic/non-phallic stelae. Flat in form, these structures are characterized by distinctive, elaborate decorations, among which are swords, a standing human figure with arms akimbo, and plant-like symbols. Sultans of Adal See also List of Sunni Muslim dynasties Isaaq Sultanate Notes Works cited Former sultanates in the medieval Horn of Africa History of Djibouti History of Eritrea 15th century in Ethiopia 16th century in Ethiopia 900 establishments 1559 disestablishments in Africa 9th-century establishments in Africa