The Christian three-aisled basilica of Brauron was built in the first half of the 6th century AD. There was a circular baptisterywith a baptismal font
See:
- Princeton Encyclopedia of Classical Sites: Brauron (Vraona) Attica, Greece-http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0006:id%3Dbrauron&redirect=true
- https://athensattica.com/point/early-christian-basilica-of-brauron/