Why was education confined in the secular churches of the priest in ancient time?

In ancient times, education was often confined to secular churches because they were among the few institutions that had the resources and structure to provide systematic learning. The clergy were primarily responsible for education, focusing on religious instruction and moral development. Additionally, access to education was limited by social class and geographic location, making church schools some of the only options available for many individuals. This centralized control over education also helped maintain the church's influence in society.