Inscriptional and literary evidence suggests that judicial proceedings, archives, treasuries, prayers, public fasts, communal meals, and lodging for traveling Judeans were all associated with the ancient synagogue. The public reading and teaching of the Torah took precedence over all else by providing the liturgical activity that set the synagogue apart, but the synagogue was much more than a religious institution and must be considered as distinctly different from its predecessor, the Temple.
Following the destruction of the Second Temple and the rise of Rabbinic Judaism, a more democratic form of worship began to take root, as well as concepts such as urbanization and institutionalization, which spread throughout the Roman, and later Byzantine, Empire. With the end of the Second Temple period came the end of the practice of sacrifice, and so the reading of the Torah filled the void. As a result, the Ark of Scrolls and the Torah shrine developed, eventually emerging as the focal point of the synagogue, representing a symbol of survival and preservation. Nearly every ancient synagogue in the land of Israel yields traces and fragments of a Torah shrine, either in the form of a raised platform as a base for the aedicula, a niche, or an apse. This evidence demonstrates the significance of the Torah shrine as one of the few consistent features within the ancient synagogue. Yet the appearance of the Torah shrine was not the only emergent trait accompanying the rise of Rabbinic Judaism.
“The Ancient Synagogue in Israel & the Diaspora” by Dana Murray
https://www.worldhistory.org/article/828/the-ancient-synagogue-in-israel–the-diaspora/