Join us for an exploration of Barcelona's Iron Cathedral, an architectural marvel designed by Antoni Rovira i Trias that occupies an entire city block. This guided tour offers a unique opportunity to delve into the Sant Antoni Market, which is a perfect fusion of past and present as it showcases a '3-in-1' market experience. We will descend into the underground levels to witness how modern architecture protects medieval fortifications and the ancient Roman Via Augusta. This event illustrates a world-renowned rehabilitation project that harmoniously integrates history, archaeology, and contemporary design within a monumental dome.