Ali al-Ridha
Ali al-Ridha, the eighth Shia Imam, entered Ahvaz on his way to Khorasan and stayed in the city, since Al-Ma'mun, Abbasid caliph, commanded to transfer Ali al-Ridha to Khorasan from Medina. A few days later, on Ali al-Ridha's accommodation, a mosque named Masjed Al-Redha was built which Ali ibn Mahziar's body buried in it according to his will. There is a salon, in the western part next-door to the grave. It's supposed to be the mosque that mentioned before.