Stone from the quarry may also have been used for the building projects of Herod Agrippa I. The subterranean quarry would have been usable in all seasons and any weather.[1] The Roman Jewish historian Flavius Josephus writes about the "Royal Caverns" of the Old City,[3] which may have been a reference to Zedekiah's Cave. The midrash Numbers Rabbah mentions the cave: "One who observed the Sabbath in a cave, even though it be like the cave of Zedekiah, which was eighteen miles long, may walk through the whole of it".[4]