2023
• The Rhythm of Calligraphy and Oud, live performance with Naseer Shamma, produced by the Abu Dhabi Arabic Language Centre, Louvre Abu Dhabi

2022
• Jafr - The Alchemy of Signs, Elmarsa Gallery, Dubai
 
2021
• AWJ, produced by the Tunisian Ministry of Culture, MACAM Gallery, Tunis

2018
• AWJ: a retrospective exhibition from 1966 to 2018, Fine Arts Centre Gallery, Sheikh Abdullah Al Salem Cultural Centre, Kuwait
• AWJ: a retrospective exhibition from 1966 to 2018, Elmarsa Gallery, Tunisia

2016
• Trance, Elmarsa Gallery, Dubai

2011
• Wasl, Rafia Gallery, Damascus

2010
• Nja Mahdaoui, Fourth Sharjah Biennial for the Art of Arabic Calligraphy, Sharjah. Awarded Medal of Honour by HH Sheikh Sultan Bin Muhammad Al Qasimi
• Wajd, Bait Muzna Gallery, Muscat, Oman
• Jafr, ou l’alchimie des signes, Galerie Omagh, Paris

2008
• Nja Mahdaoui, Dar Al Funoon, Kuwait City
• Nja Mahdaoui, Hewar Art Gallery, Riyadh
• Nja Mahdaoui, within the first Abu Dhabi Music and Arts Festival, produced by ADMAF (Abu Dhabi Music and Arts Foundation), Emirates Palace, Abu Dhabi
• Nja Mahdaoui, within the Francophone Week, produced by ADMAF, Emirates Centre for Strategic Studies and Research and Ghaf Gallery, Abu Dhabi
 
2007
• Nja Mahdaoui, Meem Gallery, Dubai

2006
• Nja Mahdaoui, Tehran Biennale, Iran. Guest of honour and jury member
• Nja Mahdaoui, Second Biennale of Calligraphy in the Arab World, Sharjah. Guest of honour and jury member

2005
• Le Maître d’amour, Galerie La Hune-Brenner, Paris

2004
• Nja Mahdaoui, Galerie Le Violon Bleu, Sidi Bou Said, Tunisia
• L’Art-Calligraphie, Espace Caliga, El Menzah, Tunisia

2002
• Nja Mahdaoui, Mohamed Bennis' Argana third International Festival of Poetry, Espace Wafabank, Casablanca

2001
• La Volupté d’en mourir, Librairie Galerie La Hune, Paris
• L’Art en Soie, Espace Caliga, El Menzah, Tunisia
• Rencontre avec Nja Mahdaoui, Galerie Andalucía, Rades, Tunisia

2000
• Graphèmes libres, Signes – Signifiances, Comptoir des Écritures, Paris
• Calligraphie, Espace Caliga, El Menzah, Tunisia

1998
• Nja Mahdaoui, Manama Art Centre, Bahrain
• Métalangage Écriture-Peinture, Espace d’Art Sadika, Gammarth, Tunisia

1997
• Tribute to Nja Mahdaoui, during the fifth Pictorial Art Week, Université de Tunis I
• L’esthétique du signe, Académie Tunisienne des Sciences‚ des Lettres et des Arts Beït El Hikma, Carthage

1996
• La Méditerranée et ses cultures, curated by Lucette Heller-Goldenberg, Galerie in der Universität Köln, Cologne
• Aya & Aya, within the fifth Session des Journées Poétiques, Faculté des Lettres, des Arts et des Humanités de la Manouba, Tunis
• Retrospective des Nuits, Galerie Arabesk, El Menzah, Tunisia

1995
• East & West, Rida Art Gallery, Jeddah
• Nja Mahdaoui, Faculté des Lettres et des Sciences Humaines de Sfax, Tunisia
• Les Mille et Une Nuits, Galerie Chiyem, El Menzah, Tunisia

1994
• A Choreographer of Letters, curated by Rose Issa, Leighton House Museum, London
• Nja Mahdaoui, Rochan Gallery, Jeddah. Sponsored by HE Mohammad Said Al-Farsi, Mayor of Jeddah
• Les Mille et Une Nuits dans l’œuvre de Nja Mahdaoui, curated by Lucette Heller-Goldenberg, Galerie in der Universität Köln, Cologne

1993
• Nja Mahdaoui, within Images of Africa ’93 festival, Galleri Kobolt, Copenhagen
• Nja Mahdaoui, Galerie Ephémères, Capvern les Bains, France
 
1992
• Calligrams, curated by Rose Issa, SOAS (School of Oriental and African Studies) Library, University of London
• Les Mille et Une Nuits, Bibliothèque municipale, Toulouse

1991
• Nja Mahdaoui, travelling exhibition: VakıfBank Kemal Sunal Art Gallery, Istanbul and VakıfBank Gallery, Ankara
• Carré Rouge, Librairie-Galerie La Proue, Lyon

1989
• Nja Mahdaoui, third Havana Biennial, Casa El Arabe, Havana
• Nja Mahdaoui, within the Journées Culturelles Tunisiennes, travelling exhibition produced by the Tunisian Ministry of Culture and the National Office of the Tunisian Tourism, Le Méridien Hotel, Abu Dhabi and Damascus

1988
• Art-Concept, Espace Sophonisbe, Carthage
• Signe et Signifiance, travelling exhibition, Centre Culturel International d’Hammamet and Maison de la Culture de Kélibia, Tunisia
 
1987
• Nja Mahdaoui: Kalligramme & Körper-Beschreibung, Arabische Kalligraphie und Moderne Kunst, curated by Wolfgang Becker, Neue Galerie – Sammlung Ludwig, Aachen, Germany
• Nja Mahdaoui, curated by Helga Kammerer, Iwalewa-Haus, Afrikazentrum der Universität Bayreuth, Germany
• L’Oeuvre de Nja Mahdaoui, curated by Lucette Heller-Goldenberg, Institut français Köln, Cologne

1986
• Nja Mahdaoui, guest of Honour at the second Havana Biennial, Centro de Arte, Havana
• Nja Mahdaoui, within the Rencontres Civilisations d’Orient, produced by the AFAA (Association Française d’Action Artistique), Ancien Évêché, Uzès, France

1985
• Pour une esthétique du signe, Centre d’Art Vivant de la Ville de Tunis
• Oriente-Mediterraneo-Occidente, pour une esthétique du signe, Institut français, Rome
 
1984
• Nja Mahdaoui, within the Journées Culturelles Tunisiennes, Maison de l’Artisanat et des Métiers d’Art, Marseille

1983
• Nja Mahdaoui, Centre Visinan, Municipalité de Montreux

1982
• Nja Mahdaoui, curated by Alain Bittar, Librairie arabe l’Olivier, Geneva

1981
• Nja Mahdaoui, curated by Hamadi Cherif, Galerie Noire, Paris
• Nja Mahdaoui, within the Journées Culturelles Tunisiennes, Klimt Ballroom, Hotel Hilton, Vienna

1980
• Nja Mahdaoui, Galerie Exler (African and Oceanic Art), Frankfurt am Main
• Nja Mahdaoui, Galerie de l’Information, Tunis
• L’Image de l’autre, UZH – Universität Zürich and  ETH Zürich – Swiss Federal Institute of Technology, Zürich
• Nja Mahdaoui, travelling exhibition within the Journées Culturelles Tunisiennes: Jeddah and Taief, Saudi Arabia; Espace Georges V, Paris; and Augsburg, Germany

1979
• Nja Mahdaoui, within the Journées Culturelles Tunisiennes, Algiers and Dakar
• Nja Mahdaoui, Maison de la Culture Ibn Rachiq, Tunis
• Nja Mahdaoui, Travelling exhibition and workshops throughout the country produced by the Tunisian National Cultural Committee, Maisons de la Culture de Kairouan, Nabeul, Sfax, and El Kef, Tunisia

1978
• Nja Mahdaoui, Maison de la Culture Ibn Khaldoun, Tunis

1977
• Nja Mahdaoui, Galerie Irtissem, Tunis
• Nja Mahdaoui, travelling exhibition and workshops produced by the Tunisian National Cultural Committee, Club Tahar Haddad; Maison de la Culture Ibn Rachiq; Ibn Khaldoun; Ibn Zeidoun; and Jbel Jloud, Tunis

1976
• Nja Mahdaoui, Galerie Nadar, Casablanca

1973
• Nja Mahdaoui, Galerie Yahia, Tunis
• Cercle et Carré, Salon des Arts, Tunis
• Nja Mahdaoui, Galerie l’Atelier, Rabat

1970
• Oeuvres récentes, Galerie Entremonde, Rue Mazarine, Paris
• Nja Mahdaoui, Salon des Arts, Tunis

1969
• Nja Mahdaoui, Galerie La Galère, Île Saint-Louis, Paris

1967
• Nja Mahdaoui, travelling exhibition, Galleria Numero, Rome, Milan, Florence and Venice
• Imponente e suggestiva, Opera – OP di Nja Mahdaoui, Chez Maxim’s, Rome
• Nja Mahdaoui, Galleria del Circolo Abruzzese, Rome
• Nja Mahdaoui, Salon des Arts, Tunis

1966
• Nja Mahdaoui, Galleria El Harka, Palermo
• Nja Mahdaoui, Centro Culturale Internazionale, Milan

1965
• Nja Mahdaoui, The Dante Alighieri Italian Cultural Centre, Tunis