History

The mosque  was built in the 14th century. It is surrounded by a courtyard. For praying during intense heat, two areas with a “mihrab” are provided outside.

Urban and Architectural

It is one of the  most amazing monuments of Tunisia's entire ancient architectural heritage, not just Djerba.

In Djerba's "landscape," he shows the harmony of the island's sacred buildings from a distance. Seen up close, the ensemble's arrangement and "anatomy" are astonishing, but they still create a transcendence that captivates the viewer. This monument consists of three parts:

A chapel towering in the middle of a fenced courtyard. The floor is covered with lime plaster.

Internal annex. It consists of a main room that housed the teachings of the Koran, and two small rooms are adjacent. One is for accommodation and the other is for food storage.

Annex and 'Koran' school with room for bathing. It is also used as an underground flour mill and bakery.

Description

The mosque is built low and reinforced by buttresses. It belonged to a group of mosques that protected the population in the event of an enemy attack. Originally, the small minaret was used not to call prayers, but  to send optical signals. Guards can scale the outer walls of the mosque and place themselves on the roof. In front of the mosque, there are several arched rooms. A school, a bread oven,  and a room for grinding and storing grains. The mosque was functioning as a bakery in the  community. Outside, there is a large whitewashed promenade. It is  used to collect rainwater and is stored in the tank below.

References

https://www.tunisiatourism.info/en/articles/la-mosquee-fadhloun-a-djerba

https://tunisiaeye.com/listing/fadhloun-mosque-djerba/