1) After becoming Caliph, Abderramán III ordered the construction of Córdoba, which became the capital city of the Caliphate, with two centers: the "madina" and Medina Azahara. 2) Medina Azahara was built in 936 on sloped land divided into three terraces for the royal family, administration, and gardens. It had well-planned defenses and infrastructure. 3) The city promoted urban planning and agriculture, restoring aqueducts and using water wheels, highlighting the advances of Arab civilization in Al-Andalus.