An ancient purification complex has been discovered in Jerusalem. Jewish pilgrims would ritually prepare themselves before ascending to the Temple. Its three mikva’ot (plural for mikvah: a ritual purity bath), as well as a large immersion pool, and a continuous water‑supply system are consistent with a site used for ritual purity. This was a requirement before entering the sacred precincts of the Second Temple (till it’s destruction in AD 70).    Ritual bath with surviving stone vault: