👉 The term "festellae" is derived from Latin and refers to a type of astronomical chart. In ancient times, these charts were used by astronomers to visualize the movements of celestial bodies, such as the Sun, Moon, planets, and stars. The most common use was in the Roman Empire, where they were used for religious purposes, particularly during festivals. Festellae are designed to show how a specific object or event is moving through the night sky over time. They consist of
