Giovanni Casertano, a renowned Italian philosopher specialized in Ancient Philosophy, passed away on December 21, 2023 in Naples. He left a significant legacy for the academic community around the world. Casertano was born on March 6, 1941 in San Prisco and was a professor of Ancient Philosophy History at the University of Naples "Federico II". He also had a strong influence from Marxism and was the personal secretary of Amadeo Bordiga, founder of the Communist Party of Italy. Casertano focused his studies on Plato and organized biennial Platonic congresses. His work covers a wide range of authors and periods, with over three hundred publications. In Brazil, he collaborated with various scholars and had his works translated into Portuguese. The text highlights Casertano's generosity and freedom of thought, as well as his materialistic and consistent stance.