The Duomo is both monument and active institution. Its structure, roof, sculpture and stained glass record successive technical and devotional decisions, while the Veneranda Fabbrica continues maintenance and access management.
Piazza del Duomo also covers earlier sacred and civic levels. Archaeology below the parvis, Palazzo Reale, the Arengario and the Galleria demonstrate that centrality was repeatedly rebuilt rather than inherited unchanged.
A responsible route separates the cathedral’s liturgical use from visitor products, and monumental public space from commercial spectacle. Piazza Mercanti and San Satiro restore scales that the main square tends to overpower.
Begin before the square fills, read construction and ground levels first, then follow the civic and commercial passages without mistaking grandeur for a single historical period.