Herod's Palace in Wikipedia

Herod's Palace was a fortified palace, built by Herod the Great to protect the Old City of Jerusalem. Part of Herodian architecture, the palace consisted of two principal buildings, each with its banquet halls, baths and accommodations for hundreds of guests.[1] The archaeological remains of Herod's Palace, however, are scarce. During the 1970s excavations an exit of a water drain belonging to Herod's Palace was discovered. It transported water from the palace into the Valley of Hinnom.[2]