Mondes Flottants / Floating Worlds is an exhibition of works by American painter Alex Katz, curated by Éric de Chassey, director of the Institut national de l'histoire de l'art, around the theme of water.

From seascapes to studies on light and reflections on water, these often monumental paintings, realised between 1989 and 2020, challenge the traditional notion of landscape, questioning what is reality and what is illusion.