Hegra (), also known as Mada'in Salih (), or Al-Ḥijr () is an archaeological site located in the area of AlUla within Al Madinah Region in the Hejaz, Saudi Arabia. A majority of the remains date from the Nabatean kingdom (1st century AD). The site constitutes the kingdom's southernmost and largest settlement after Petra (modern-day Jordan), its capital. Traces of Lihyanite and Roman occupation before and after the Nabatean rule, respectively, can also be found.