A Mikvah is a pool of water or bath used for the ritualistic cleansing of married Jewish women, although they are sometimes used by men.
The Second-Temple-era pool was found near the modern-day Gethsemane church.
Mikvahs are traditionally found in residential areas and public buildings but this one was found by itself when digging out a visitors’ tunnel.
According to Dr Re’em, the bath may have been used by local wine and oil producers because of Jewish laws of purification.
Today, the Church of Gethsemane or the Church of All Nations is a Roman Catholic house of worship on the Mount of Olives.
source: express.co.uk