Espírito Singular is the result of a joint project between the Centro de Arte Oliva (São João da Madeira), the Treger Saint Silvestre Collection, on deposit at this institution since 2014, and the Halle Saint Pierre (Paris). The exhibition and catalogue had their first presentation in Paris in 2024 under the title L’esprit singulier.

ARTISTS: A.C.M., Adolf Wölfli, Agnès Baillon, Albino Braz, Alexander Lobanov, Alfredo García Revuelta, Aloïse Corbaz, Anna Zemánková, Anónimo (Angola), Anónimo (Brasil), Anónimo (EUA), Artur Moreira, August Walla, Augustin Lesage, Barbara Demlczuk, Carlo Zinelli, Carolein Smit, Charles Schley, Dado (Miodrag Djuric), Damián Valdés Dilla, David Houis, Derrick Alexis Coard, Dexter Nyamainasche, Dwight Mackintosh, Edmund Monsiel, Ergasto Monichón, Erró (Guðmundur Guðmundsson), Eudes Menichetti, Eugene Von Bruenchenhein, Foma Jaremtschuk, Franco Bellucci, Fred Deux, Friedrich Schröder-Sonnenstern, Gaël Dufrene, George Widener, Gerald DePrie, Giovanni Battista Podestà, Giovanni Galli, Gorgali Lorestani, Guo Fengyi, Henry Darger, Henry Speller, Ida Buchmann, Jacques Deal, Jaime Fernandes, James Deeds, Jesuys Crystiano, Jimmy Lee Sudduth, Johann Hauser, Johannes Stek, John Henry Toney, Jorge Alberto Cadi, Josef Wittlich, Karl Hans Janke, Kostia Botkine, Lee Godie, Louis Pons, Luboš Plný, Marc Giai-Miniet, Marcel Bascoulard, Marco Berlanda, Margarethe Held, Marilena Pelosi, Martha Grünenwaldt, Mary T. Smith, Mettraux, Michail Paule, Michèle Burles, Miroslav Tichý, Misleidys Francisca Castillo Pedroso, Mónica Machado, Mose Tolliver, Pascal Tassini, Paul Goesch, Pierre Molinier, Pietro Ghizzardi, Prophet Royal Robertson, Raphaël Leonardini, Raphaël Lonné, Scottie Wilson, Terry Turrell, Théo (Théodore Wagemann), Thornton Dial, Tomás Vieira, Tomasz Machciński, William Hawkins.