Whats three enlightened monarchs during the eighteenth century were?

They were:

The Empress born in Prussia in 1729, more precisely in the city of Stettin, was the great modernizer of the Russian Empire despite being a foreigner. In 34 years she has governed with absolute obstinacy, extending the frontiers of the Empire, promoting the arts and enacting laws to improve education, as well as carrying out a real reform in the administration.

Frederick II was king of Prussia, a kingdom that existed from 1740 to 1786 where it is today Germany. A great military leader, he turned Prussia into a great European power. His military genius, his love for the arts and his modern administration earned him the title Frederick the Great.

Joseph II was Emperor Romano-Germanic and Archduke of Austria from 1765 until his death, besides King of Hungary, Croatia and Bohemia from 1780.

answer; /// i believe that they became successful farmers; ///////////////