“L’abstraction solitaire de Hans Hartung”, text published in the catalogue of the exhibition Hans Hartung. La fabrique du geste (11 October 2019-1 March 2020), Musée d’art moderne de la ville de Paris, to be published (autumn 2019). This text returns to the context of abstraction in Paris in the 1940-1950s and presents the main issues related to the so called “lyrical abstraction”.