The Zeitouna Mosque:
It is the largest and oldest mosque of the Medina of Tunis. It was founded in 698 under the reign of the Umayyads. The Great Mosque rises in the middle of a central core which has probably been occupied by a Christian basilica or a Byzantine fort. Beyond its religious role, the great mosque played a defensive and educational role. Several students of the Muslim world attended the Zeitouna mosque, where great scholars taught.
The Okba Ibn Nafaa Mosque:
It is also called the Great Mosque of Kairouan. It represents the most ancient Tunisian religious building of Islam and Muslim West. Its foundation dates back to the foundation of Kairouan in 670 by the Arab General Okba Ibn Nafaa. The mosque has been subject to several changes but the most significant one dates back to the half of the IXth century. During this change that allowed the shaping of its morphology and current dimensions, the mosque of Okbaa has been completely demolished except its mihrab that still exists till nowadays.
The Great Mosque of Sousse:
According to the kufic inscription in relief on the upper part of its arcades, the Great Mosque of Sousse was founded under the reign of the Aghlabid Emir Abu El Abbes Mohamed in 851. Its unusual location at the end of the Medina of Sousse next to the tower of Ribat indicates its fundamental role in the defense of the city. The presence of merlons on the outer wall and corner towers, one of which is used for the calls to prayer, also explains the defensive role that the mosque played.
The Great Mosque of Sfax:
The Great Mosque occupies precisely the heart of the Medina of Sfax. Various souks surround it. It was founded by the Aghlabids towards the half of the IXth century. Several campaigns of reconstruction, enlargement, and improvement have allowed the Great Mosque to have significant architectural recognition. The beautiful eastern side of the mosque and the minaret richly decorated with foliage motifs and with kufic inscriptions are the results of the changes that occurred during the Zirid period.
The Great Mosque of Testour:
The Great Mosque was founded in 1631 by one of the immigrants of Andalusian origin in Testour. This architectural exception is the result of a mixture between local building traditions and Moresque decorative techniques. The Great Mosque of Testour is known for its lengthy minaret which has its upper part in an octagonal shape decorated with enameled ceramics and an inverted clock.