A monastery was built there by the Christian monk Hilarion in the mid-4th century AD .
A monastery was is currently believed to be the site of a mosque dedicated to Saint George , known locally as al - Khidr .
A monastery was built there by the Christian monk Hilarion in the mid-4th century AD and is currently believed to be the site of a mosque dedicated to Saint George , known locally as al - Khidr .