The main way in which the causes of the enlightenment were similar to the causes of the industrial revolution was that both focusses on the "common man" instead of the elite.
Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
(4) uniting the Ottoman Empire under an
efficient government structure
The reign of Suleiman the Magnificent is considered the peak of the Ottoman Empire.
Suleiman was able to organize the vast empire using bureaucratic methods. Under Suleiman laws were clarified with the use of advisers and government officials. Laws were created to provide the vast empire with consistency as well as stability after conquest.
Five Years each term and is, renewable
<span>once consecutively</span>