As agricultural producers, military strength, religious leaders, geographic extent.
Explanation:
Any empire must enjoy a powerful economy to sustain its expansion, a conquering army constantly on the move. Very often in history, empires showed at its zenith superior forms of production and labor methods, taking advantage of conditions and human skills. Besides, ruling lands from North Africa to the Middle East and Europe, the Ottoman Empire had considerable extension. Its greatest rulers were men with strong leadership and clear purposes. For may centuries, Europe feared the Ottoman rule.
Since he lived in a theocratic government, he was tried by the Holy Office for teaching that the Earth revolves around the Sun which was deemed a heretic by the Catholic Church.
