Kim Lesley Hartman

The first pies appeared around 9500 BC, in the Egyptian Neolithic period or New Stone Age, when the use of stone tools shaped by polishing or grinding became common, the domestication of plants and animals, the establishment of permanent villages, and the practice of crafts such as pottery and weaving. Early pies were known as galettes, wrapping honey as a treat inside a cover of ground oats, wheat, rye or barley. These galettes developed into a form of early sweet pastry or desserts.
The 1st century Roman cookbook Apicius make various mention of various recipes which involve a pie case. By 160 BC, Roman statesman Marcus Porcius Cato (234-149 BC) who wrote De Agri Cultura, notes the recipe for the most popular pie/cake called Placenta. Also called libum by the Romans, it was more like a modern day cheesecake on a pastry base, often used as an offering to the gods.