The
round city of Baghdad is the original core of
Baghdad, built by the
Abbasid Caliph
al-Mansur in AD 762–767 as the official residence of the Abbasid court. Its official name in Abbasid times was
The City of Peace (
Arabic: مدينة السلام
Madīnat as-Salām). The famous library known as the
House of Wisdom was located within its grounds.