Horn of Africa at the 2012 London Olympics. According to the IMF, in 2010 the Horn of Africa region had a total GDP (PPP) of $106.224 billion and nominal of $35.819 billion. Per capita, the GDP in 2010 was $1061 (PPP) and $358 (nominal). States of the region depend largely on a few key exports: Over 95% of cross-border trade within the region is unofficial and undocumented, carried out by pastoralists trading livestock. The unofficial trade of live cattle, camels, sheep and goats from Ethiopia sold to other countries in the Horn and the wider Eastern Africa region, including Somalia and Djibouti, generates
Horn of Africa to wall paintings of the 7th century CE. Somali architecture includes the Fakr ad-Din Mosque, which was built in 1269 by the Fakr ad-Din, the first Sultan of the Sultanate of Mogadishu. Ethiopia is renowned for its ancient churches, such as at the UNESCO World Heritage Site at Lalibela. The Horn has produced numerous indigenous writing systems. Among these is Ge'ez script ( ') (also known as "Ethiopic"), which has been written in for at least 2000 years. It is an abugida script that was originally developed to write the Ge'ez language. In speech communities that use it, such as