In this aerial view of Jerusalem you can see the Temple Mount enclosure and most of the Old City of Jerusalem. The Kidron Valley and the western slope of the Mount of Olives is visible on the right of the photo.
The photo below is a cropped portion of the image with emphasis on the Temple Mount.
Herod the Great began to rebuild the existing postexilic temple on a grander scale about 20 B.C. Work had been going on for 46 years in the early days of the ministry of Jesus.
Then the Jewish leaders said to him, “This temple has been under construction for forty-six years, and are you going to raise it up in three days?” (John 2:20 NET)