The Eastern Wall is the oldest of the four visible walls of the Temple Mount; the Northern, Western and Southern Walls date from the period of Herod the Great, who expanded the area of the Temple Mount to the north, west and south. Older walls on these sides are presumed to survive underground. The Eastern Wall now visible was built in at least four stages, during the reign of Hezekiah, during the time of Zerubbabel, in the Hasmonean period and in the Herodian period. Repairs and major renovations were made in later periods. Major renovations to the Golden Gate were made in the Umayyad period.