Ad Fontes: Renaissance (Regal Edition) Playing Card DeckIntroducing Ad Fontes, Renaissance Playing cards, featuring hand painted imagery by artist Ritu Bhattacharya. Ad Fontes, meaning, "back to the source" in Latin, was a closely held belief for Martin Luther, among many others. Luther believed that old Greek sources were more important than the Pope's word, which led him to become the father of Lutheranism. This project was planned with the idea to create a deck of cards to tell the story of the