1+1. The relational years is the first major retrospective in the world dedicated to relational aesthetics, on view at the MAXXI – National Museum of 21st Century Arts from 29 October 2025 to 1 March 2026. Curated by Nicolas Bourriaud with associate curator Eleonora Farina, the exhibition traces the evolution of one of the most influential movements of the new millennium, thirty years after its affirmation.