The Adal Sultanate or the Kingdom of Adal (1415-1555) was a medieval multi-ethnic Muslim state located in the Horn of Africa (controlled large parts of the modern states of Djibouti, Eritrea, Ethiopia and Somalia). At the height of it's power and prosperity the kingdom extended from Saylac the capital, through the Jijiga valleys, and the Harer plateau to the Ethiopian highlands. Known for cosmopolitanism of it's people, architectual sophistication, great mosques and higher learning. At the turn of the 16th century, the Adal Sultanate organised an army led by Ahmad Gurey ('Ahmad the left-handed', also known as Ahmad ibn Ibrihim al-Ghazi or in Ethiopia as 'Ahmad Gran') to invade Christian Ethiopia and briefly conqured much of the Abyssinian highlands. Ahmad Gurey's army was defeated by a decisive intervention of Christian Ethiopia's european Christian allies, the Portuguese. Somali participation in these wars remains a vivid part of Somalia's folk consciousness in the region.