Question

What caused the renewal of interest in the classical civilizations of greece and rome

Answer 1

The new techniques of printing permitted the spread of reading. The Classical Age of Balkan country begins with the Persian War (490-479 B.C.) and ends with the death of Alexander the nice (323 B.C.).
Besides war and conquest, during this amount of Ancient Balkan country of books , and among those being written were new editions of all the classical works 

Answer 2

The renewal of interest in the classical civilizations of greece and rome came about due to the Renaissance that began in Italy, since people were eager to get involved in the arts in sciences again, after a long period of "dark ages" with little to no advancement in this arena.