The Jame' Mosque of Dezful is situated in the central square of the city and is a remnant of the 3rd or 4th century AH. The same has been repeatedly undergone repairs in 7th, 9th and 11th and recent centuries AH, which has resulted in its expansion. The structure of the mosque comprises of the main entrance, porches, a vast courtyard and nocturnal areas (Shabestans) to the south and east. The mosque has four small entrances, three of which are blocked. The north west facade is a remnant of the 12th century AH and is adorned with arches and tile works. The main part of the current mosque is its pillared nocturnal area to the south. The ceiling and brick dome of this Shabestan is erected on stone pillars. The eastern porch is a construction of the Safavid era, while the nocturnal area of the mosque is its oldest segment. On the northern and western side walls of the mosque the dates of 13th and 14th centuries AH have been designated.