Guided tour of Montmartre by Veronica Antonelli and Thierry Legou + "Spirale du prieuré St Ayoul de Provins" artwork 30 cm x 30 cm work "Spirale du prieuré St Ayoul de Provins" by soprano Veronica ANTONELLI and live video of the acoustics + 2 adult tickets for "Montmartre Enchanté Art et Science" on May 25, 2026 at 3:30 pm: an immersion guided by Veronica ANTONELLI and Thierry LEGOU, researcher at the CNRS, a rare journey between acoustic a cappella singing of monuments, measured emotions and scientific explanations. A package that combines art, science and living heritage, and offers the chance to understand and feel what "The invisible is perceptible" means.