Who was one of the Renaissance scholars and writers who devoted themselves to the study of the subjects taught in ancient Greek and Roman schools?

The scholars who devoted themselves to the study of ancient Roman texts in Latin and ancient Greek texts were the humanists. The father of Humanism was Petrarch who advocated the study of Latin literature and rhetoric. He lived in the 14th century, before the beginning of the Renaissance.

Originally the humanists only studied Roman texts as no one could read Greek and knowledge of Greek works had been lost. The learning of ancient Greek and ancient Greek texts followed the fall of Constantinople in 1453. Many Greek scholars went to Italy, taught Greek and the study of Greek texts. The main effect of this was the revival of ancient Greek philosophy.