Christian Lequesne, holds BA and MA degrees from Sciences Po Strasbourg and the College of Europe, Bruges. He then got his Ph.D. in political science and his Habilitation in Sciences Po Paris (Supervisor: Professor Alfred Grosser). Assistant, Department of Political and Administrative Studies of the College of Europe (1986-1988). Research fellow and then Professor at Sciences Po since 1988, he was deputy director of CERI from 2000 to 2003, and director of CERI from 2009 to 2013. Director of the Centre français de recherche en sciences sociales (CEFRES) in Prague from 2004 to 2006, LSE-Sciences Po Alliance Professor at the European Institute of the London School of Economics from 2006 to 2008, member and vice-president of the Board of Directors of Sciences Pofrom 2007 to 2013. He is a regular visiting professor at the School of Government of LUISS University and the Diplomatic Academy in Vienna.

Co-Founder and Co-Chief Editor with Prof. Christopher Hill (Cambridge) of European Review of International Studies (Brill), member of the international adversory board of The Hague Journal of Diplomacy, Journal of European Integration; Politics in Central Europe, Politique européenne.

Member of the evaluation committee of the European Research Council (ERC); member of scientific council of the Finnish Institute of International Affairs.

Regular columnist in the daily newspaper Ouest France. Was awarded the F. Palacky social sciences medal by the Czech Academy of Sciences and Chevalier in the Ordre des Palmes académiques.

Ph.D under my supervision: Louis Baudrin, Salih Bora, Léonard Colomba-Petteng, Augustin Normand, Earl Wang.

Ph.D completed: Philippe Rivaud (European Commission, Brussels), Emiliano Grossmann (Associate Professor, Paris), Sabine Saurugger (Director, Sciences Po Grenoble), Damien Helly (Consultant, Brussels), Isabelle Bruno (Lecturer,Lille), Elizabeth Sheppard (Lecturer, Tours), Stephan Davidshoffer (Lecturer, Geneva). Samuel Faure (Lecturer, Saint-Germain-en-Laye), Charles Sitzenstuhl (Deputy at French National Assembly), Anja Thomas (Fellow, EUI Florence), Alex Issa (Professor, ESSEC), Louis-Simon Boileau, Gabriel Castillo (Consultant, Paris), Catharine Damron, Yang Di.

Habilitation Works completed: Christopher Bickerton (Reader, Cambridge), Thierry Chopin (Special Adviser, Institut Jacques Delors), Elsa Tulmets (Marc Bloch Center), Laure Delcour (Senior Lecturer, Sorbonne nouvelle), Michal Onderco (Associate Professor, University of Rotterdam).

- French diplomacy towards its diaspora
- European Union and enlargement process

The International Dimensions and Effects of Populism (IDEoPOP)

Sciences Po
The European Union as an External Actor (master)
Networks and Diplomacy (master)
Diplomatic Practices in the World (master)
The Geopolitics of the European Union (master)

LUISS University, Roma
Negotiation and decision in the European Union (master)

Diplomatische Akademie, Vienna
Contemporary Diplomatic Practices (master)

• Christian Lequesne. Home Diplomacy Across Borders: Consular and Diaspora Diplomacy in France. Jan Melissen, HwaJung Kim, and Githma Chandrasekara (eds). Home Engagement in Diplomacy. Global Affairs and Domestic Publics, 23, Brill, pp.96-116, 2025, Diplomatic Studies, 978-90-04-73831-7. ⟨10.1163/9789004738324_006⟩. ⟨hal-05317644⟩
• Kira Huju, Christian Lequesne. Career Diplomats and Populist Leaders. Mediating or Marketing Estrangement?. Routledge Handbook of Populism and Foreign Policy, Routledge, pp.289-307, 2025, 9781032540184. ⟨10.4324/9781003414797-20⟩. ⟨hal-05140799⟩
• Christian Lequesne. Le diplomate et les Français de l'étranger. Presses de Sciences Po, pp.176, 2024, 9782724642803. ⟨hal-04577282⟩
• Christian Lequesne. L’Occident et l’Europe, entre valeurs et géopolitique. Comprendre son temps, 2024, 1, pp.16-22. ⟨hal-04596393⟩
• Christian Lequesne. L’Union européenne. Stéphane Paquin; Kristine Plouffe-Malette (dir.). Organisations internationales. Droit et politique de la gouvernance mondiale, Presses de la Société Québécoise de Droit International, pp.423-431, 2024, 9782925442011. ⟨hal-04438529⟩
• Christian Lequesne. La Francia e l’Unione Europea: promuovere al meglio l’interesse nazionale grazie a Bruxelles. Europa Tra Presente et Futuro, 2023, pp.780-788. ⟨hal-04439906⟩
• Salih Bora, Christian Lequesne. Europäische Souveränität als Rettung für die nationale Souveränität Frankreichs: Die Geschichte einer diskursiven Referenz. Thomas Maissen; Niels F. May; Rainer Maria Kiesow. Souveränität im Wandel: Frankreich und Deutschland. 14.-21. Jahrhundert, Wallstein Verlag, pp.406-419, 2023, 9783835354555. ⟨10.46500/83535455-023⟩. ⟨hal-04267906⟩
• Christian Lequesne. La langue française dans l’Union européenne. Pouvoirs - Revue française d’études constitutionnelles et politiques, 2023, 2023/3 (186), pp.79-88. ⟨10.3917/pouv.186.0079⟩. ⟨hal-04200874⟩
• Salih Bora, Christian Lequesne. French presidents and the discursive use of European Sovereignty: more than a metaphor. Journal of European Integration / Revue d'Intégration Européenne, 2023, 18 p. ⟨10.1080/07036337.2023.2212318⟩. ⟨hal-04098520⟩
• Samuel B.H. Faure, Christian Lequesne. Introduction: Understanding the European Union in the 21st century. Samuel B. H. Faure, Christian Lequesne (eds). The Elgar Companion to the European Union, Edward Elgar Publishing, pp.1-11, 2023, 9781800883420. ⟨10.4337/9781800883437.00007⟩. ⟨hal-04087811⟩
• Samuel B.H. Faure, Christian Lequesne (Dir.). The Elgar Companion to the European Union. Edward Elgar Publishing, 388 p., 2023, Elgar Companions to International Organisations series, 9781800883420. ⟨10.4337/9781800883437⟩. ⟨hal-04087791⟩
• Christian Lequesne, Olivier Delas. Discussion autour du concept d’autonomie stratégique de l’Union européenne. Olivier Delas, Mulry Mondélice, Olivier Bichsel (dir.). L'Union européenne, puissance globale dans les relations internationales et transatlantiques, Bruylant, pp.105-113, 2023, Mondialisation et droit international, 9782802771692. ⟨hal-04023025⟩
• Christian Lequesne. Les difficultés françaises à penser la grande Europe. Revue Esprit, 2023, 2023/1-2 (Janvier-Février) (493-494), pp.13-17. ⟨10.3917/espri.2301.0013⟩. ⟨hal-03962455⟩
• Christian Lequesne, Simon Derieux-Billaud. The Ideal Diplomat. Patrick James. Oxford Bibliographies in International Relations, Oxford University Press, 2023, ⟨10.1093/OBO/9780199743292-0317⟩. ⟨hal-03962526⟩
• Thierry Chopin, Christian Lequesne. L’Union européenne dans un continent en guerre. Politique étrangère, 2022, Automne (3), pp.75-87. ⟨10.3917/pe.223.0075⟩. ⟨hal-03778826⟩
• Christian Lequesne. Niels Ringe, "The Language of Politics. Multilingual Policy-Making in the European Union". European Review of International Studies, 2022, 9 (2), pp.337-338. ⟨10.1163/21967415-09020012⟩. ⟨hal-03765432⟩
• Christian Lequesne, Olivier Rozenberg. France: Solidarity for Others… and for Itself!. Kaeding; M.; Pollak; J.; Schmidt; P. (eds). European Solidarity in Action and the Future of Europe, Springer International Publishing, pp.41-44, 2022, The Future of Europe, 9783030865368. ⟨10.1007/978-3-030-86537-5_10⟩. ⟨hal-03662409⟩
• Christian Lequesne. Understanding Ministries of Foreign Affairs in the World. 2022. ⟨hal-03729510⟩
• Christian Lequesne. Ukraine : l’Europe retrouve-t-elle sa raison d’être ?. Les Dossiers du CERI, 2022, Dossier « Ukraine : la guerre de Poutine », Avril 2022. ⟨hal-03651340⟩
• Christian Lequesne. Ministries of Foreign Affairs: A Crucial Institution to be Revisited. Ministries of Foreign Affairs in the World. Actors of State Diplomacy, 18, Brill, pp.1-12, 2022, Diplomatic Studies, 9789004505872. ⟨10.1163/9789004505889_002⟩. ⟨hal-03613660⟩
• Christian Lequesne (Dir.). Ministries of Foreign Affairs in the World. Actors of State Diplomacy. Brill, 18, 2022, Diplomatic Studies, 9789004505872. ⟨hal-03613650⟩
• Salih Bora, Léonard Colomba-Petteng, Christian Lequesne, Earl Wang. Remote Interviews of Brussels Elites During the COVID-19 Crisis. SAGE Research Methods Cases, en ligne, SAGE, 2022, 9781529604153. ⟨10.4135/9781529604153⟩. ⟨hal-03606174⟩
• Christian Lequesne, Gabriel Castillo, Minda Holm, Walid Jumblatt, Walid Jumblatt Bin Abdullah, et al.. Ethnic Diversity in the Recruitment of Diplomats: Why Ministries of Foreign Affairs Take the Issue Seriously. Ministries of Foreign Affairs in the World, Brill | Nijhoff, pp.68-88, 2022, 9789004505872. ⟨10.1163/9789004505889_005⟩. ⟨hal-03613691⟩
• Christian Lequesne. France: A European Middle Power with Still a Global Ambition. Brian McKercher (ed.). The Routledge Handbook of Diplomacy and Statecraft, Routledge, pp.82-91, 2022, 9780367860424. ⟨hal-03808368⟩
• Christian Lequesne. Une présidence de l’Union européenne rythmée par l’élection présidentielle française. Questions internationales, 2021, 110 (novembre-décembre 2021), pp.11-17. ⟨hal-03479099⟩
• Christian Lequesne, David Cadier. Tracing the Impact of Populism on European Foreign Policies. Comparative European Politics, 19 (6), 2021. ⟨hal-03470502⟩
• Christian Lequesne. Populist governments and career diplomats in the EU: the challenge of political capture. Comparative European Politics, 2021, 19 (6), pp.779-795. ⟨10.1057/s41295-021-00261-6⟩. ⟨hal-03380819⟩
• Christian Lequesne. Diversité linguistique et langue française en Europe. [Rapport de recherche] Ministère de l'Europe et des Affaires étrangères. 2021, 284 p. ⟨hal-03612842⟩
• Christian Lequesne. Entretien - La puissance par l'image. Les Etats et leur diplomatie publique. 2021. ⟨hal-03384116⟩
• Christian Lequesne. La diplomatie publique au service de la puissance étatique. Christian Lequesne. La puissance par l'image. Les Etats et leur diplomatie publique, Presses de Sciences Po, pp.9 - 32, 2021, 9782724627251. ⟨hal-03380915⟩
• Christian Lequesne. La puissance par l'image. Les Etats et leur diplomatie publique. Presses de Sciences Po, 208 p., 2021, L'Enjeu mondial, 9782724627251. ⟨hal-03380914⟩
• Christian Lequesne. Récurrences et changements dans l’engagement européen. Bertrand Badie; Dominique Vidal. La France, une puissance contrariée. L'état du monde 2022, Éditions La Découverte, pp.72 - 80, 2021, 9782348069871. ⟨10.3917/dec.badie.2021.01.0072⟩. ⟨hal-03380938⟩
• Delphine Deschaux-Dutard, Christian Lequesne. Introduction. Politique européenne, 2021, 2020/4 (70), pp.8-17. ⟨10.3917/poeu.070.0008⟩. ⟨hal-03380842⟩
• Christian Lequesne. Réflexions sur l’outil diplomatique de la France. Frédéric Charillon. La France dans le monde, CNRS Éditions, pp.163 - 177, 2021, 9782271136053. ⟨hal-03283881⟩
• Christian Lequesne. The troubling reform of Poland’s Foreign Service. 2021. ⟨hal-03385506⟩
• Richard Beardsworth, Christian Lequesne, François Rocchi. Plausible Norms of Warfare. Interview with Richard Beardsworth. 2021. ⟨hal-03385703⟩
• Thierry Chopin, Christian Lequesne. Disintegration reversed: Brexit and the cohesiveness of the EU27. Journal of Contemporary European Studies, 2021, 29 (3), pp.419-431. ⟨10.1080/14782804.2020.1714560⟩. ⟨hal-03566910⟩
• Christian Lequesne. Union européenne : l’intérêt des Etats passe avant la solidarité. Alternatives Economiques. Hors - série, 2021, 122, pp.26 - 27. ⟨hal-03380863⟩
• Christian Lequesne. Le Brexit et l’importance d'une Europe unie. 2020. ⟨hal-03391844⟩
• Anja Thomas, Christian Lequesne. L’Allemagne, le Bundestag et le Parlement européen : du Traité de Maastricht au Traité de Lisbonne. Relations internationales, 2020, 2020/4 (184), pp.55 - 72. ⟨10.3917/ri.184.0055⟩. ⟨hal-03380865⟩
• David Cadier, Christian Lequesne. How Populism Impacts EU Foreign Policy. 2020. ⟨hal-03592985⟩
• Christian Lequesne. Les relations entre l'Union européenne et le Royaume-Uni : vers un accord final ?. 2020. ⟨hal-03389179⟩
• Christian Lequesne. ERIS, A Genuinly European Journal. Interview with Christian Lequesne. 2020. ⟨hal-03385901⟩
• Christian Lequesne. La diaspora française de Londres à l’heure du Brexit. Les Études du CERI, 250, pp.38, 2020, ⟨10.25647/etudesduceri.250⟩. ⟨hal-03386603⟩
• Christian Lequesne. Covid-19 : Quelle solidarité européenne ?. Les Dossiers du CERI, 2020, en ligne. ⟨hal-03566685⟩
• Christian Lequesne, Earl Wang. Covid-19: Lessons from China’s public diplomacy in the EU. 2020. ⟨hal-03391881⟩
• Simon Bulmer, Christian Lequesne. Contrasting States of Europeanization?. Simon Bulmer; Christian Lequesne. The Member States of the European Union, Oxford University Press, 2020, 9780198737391. ⟨hal-03381010⟩
• Simon Bulmer, Christian Lequesne. Conclusion - The Member States of the European Union. Simon Bulmer; Christian Lequesne. The Member States of the European Union, Oxford University Press, 2020, 9780198737391. ⟨hal-03381009⟩
• Simon Bulmer, Christian Lequesne (Dir.). The Member States of the European Union. Simon Bulmer; Christian Lequesne. Oxford University Press, pp.504, 2020, The New European Union Series, 9780198737391. ⟨hal-03381008⟩
• Simon Bulmer, Christian Lequesne. The European Union and its Member States: An Overview. Simon Bulmer; Christian Lequesne. The Member States of the European Union, Oxford University Press, 2020, 9780198737391. ⟨hal-03381007⟩
• Christian Lequesne. Ministries of Foreign Affairs: A Crucial Institution Revisited. Hague Journal of Diplomacy, 2020, en ligne, ⟨10.1163/1871191X-BJA10003⟩. ⟨hal-03570775⟩
• Christian Lequesne. Ministries of Foreign Affairs: Institutional Responses to Complexity Diplomacy. Christian Lequesne. Hague Journal of Diplomacy, 15 (1-2 (mars 2020)), pp.209, 2020. ⟨hal-03386593⟩