The empire was at its peak under Emperor Mansa Musa I, who ruled from 1312 to 1337. Mansa Musa I is one of the richest people who ever lived and would have brought in 415 billion dollars in 25 years Rule.
Mali was a major gold producer, and the emperor had half the world production of this precious metal traded with traders from Egypt, Persia, Genoa and Venice.
The jewel of the Sahara, the capital of the empire, Timbuktu, was a renowned center of learning, culture and commerce. The empire of Mali survived until the 16th century, but its wealth and power had declined sharply. Shadow of himself, Mali has since become impoverished.
Turkey is anything but poor, but it is not very rich. The country is classified as an emerging economy with a GDP per capita of around 11,000 USD (7,700 GBP), which is about the world average, but lower than the majority of European countries.
By the sixteenth century, the Ottoman Empire, which gave rise to modern Turkey, had a GDP equal to two-thirds of Western Europe. Around the middle of the century, the rich Empire comprised Anatolia and much of southeastern Europe, North Africa, and the Middle East.
The empire gained superpower status during the reign of Sultan Suleiman the Magnificent, who ruled from 1520 to 1566, and a golden age of military capability, unprecedented prosperity, and great power gave artistic success.