Which ancient scholar's work formed the basis of the geocentric model adopted during the Renaissance?

The works of Ptolemy played a crucial role in the establishment of the geocentric model, which posited that the Earth is at the center of the universe and that all celestial bodies, including the Sun and planets, orbit around it. Ptolemy's most significant contribution was his seminal text, the "Almagest," written in the 2nd century CE. This work systematically compiled and expanded upon earlier astronomical knowledge, particularly that of Aristotle and other scholars, and included comprehensive tables of planetary movements and a detailed explanation of the geocentric model.

During the Renaissance, Ptolemy's ideas were widely accepted and became the dominant view of the cosmos for many centuries, influencing both scientific thought and theological perspectives. His model provided a framework that was used to predict planetary positions, which was crucial for navigation and astronomy at the time. The eventual challenge to this model by figures such as Copernicus would come later, marking a significant shift in astronomical understanding.