Hadrian's Arch or Triumphal Arch was constructed in 130 AD on the orders of Ancient Roman Emperor Hadrian after he spent a whole winter in Jerash. Ancient engineers built Hadrian's Arch almost half a kilometer from the South Gate in hopes that the city will grow and develop in this direction. The these city plans were not realized and the arch remained in a virtually empty field. Today magnificent Hadrian's Arch is the main entrance to the Jerash Archeological site.