Giovanni Della Casa was an Italian poet, diplomat, and cleric born in 1503 in Florence. He is best known for his work "Galateo," a guide to etiquette and manners that reflects the social customs of the Renaissance period. Della Casa's writing emphasizes the importance of civility and decorum in social interactions. In addition to his literary contributions, Della Casa served as a papal nuncio and held various positions within the Catholic Church. His influence extended beyond literature, as he played a role in the cultural and political life of Italy during the 16th century. He passed away in 1556.