Summarize in 20 words

In the annals of African history, no one has left more of an imprint on the outside world than Mansa Kankan Musa, ruler of Mali from 1312-37 A.D. Also known as Gongo Musa, he became one of the most powerful leaders of his time and was to make Mali's name renowned throughout the European and Islamic countries. Beginning in the 14th century, his name and that of Mali were to become synonymous with opulence, learning and justice.
Called by historians Musa the Magnificent, he was a very successful leader, celebrated for his enlightenment, justice and piety.
Inheriting a great empire, he extended its boundaries and made his country a world power. Perhaps his greatest contribution to Mali history was the spread of its fame and prestige to other lands.
The Empire of Mali was founded by the great warrior-diplomat, Sundiata, who reigned from 1230-55 A.D., on the Mandinka plateau between the Niger and Senegal Rivers. Here, in the original home of the Mandingo people, Sundiata built his capital, Niani, at the confluence of the Niger and Sankarani Rivers. A man of foresight, he extended the country's boundaries and enforced throughout his realm, excellent law and order. More than any other ruler in his time, he encouraged agriculture, especially the cultivation of cotton and the mining of gold. His policies were to make him one of the most heroic and constructive rulers in African history.
After Sundiata's death in 1255, there was, until Mansa Musa took power in 1312, a period of confusion. At least six different rulers took power, but the only concrete achievements attributed to these sovereigns was the extension of Mali's boundaries.
When Mansa Musa took over the helm of state, he added the important towns of Timbuktu and Gao to his kingdom. However, his greatest contribution to Mali's history was the consolidation of the foundation laid by Sundiata. Subsequently, Musa's name and that of Sundiata were to dominate the history of the empire.
Known as the country's architect, Mansa Musa welded a nation, out of a huge mosaic of peoples, whose leaders for 150 years dominated the affairs of West Africa. Establishing Islam as the base for uniting the wide diversity of tribes, he championed this religion with extraordinary zeal. Mali had been nominally Muslim before his time but under his rule Islam became well established in the Royal Court and was installed as the official state religion. Thereafter, the urban centers throughout the country took on an Islamic character. It is said that the historic greatness of Mali was due to the fact that Musa placed his country firmly in the Muslim world.

Mansa Musa, ruler of Mali from 1312-37 A.D., was a powerful leader who spread Mali's fame and prestige, championing Islam and establishing it as the official state religion.