Robinson's Arch is the name given to a monumental staircase carried by an unusually wide stone arch, which once stood at the southwestern corner of the Temple Mount. It was built as part of the expansion of the Second Temple initiated by Herod the Great at the end of the 1st century BCE. Recent findings suggest that it may not have been completed until at least 20 years after his death. The massive stone span was constructed along with the retaining walls of the Temple Mount. It carried traffic up from ancient Jerusalem's Lower Market area and over the Tyropoeon street to the Royal Stoa complex on the esplanade of the Mount. The overpass was destroyed during the First Jewish–Roman War, only a few decades after its completion.