Città e Cattedrali is a cultural heritage portal dedicated to the ecclesiastical sites of Piedmont and the Aosta Valley. Developed to make this significant religious and artistic heritage easier to discover, it brings together information about churches, cathedrals, abbeys, monasteries, chapels, confraternities, museums, sanctuaries and other historic places. Visitors can explore sites through geographic and thematic itineraries, with descriptions that explain their historical, artistic, liturgical and devotional significance.

The portal also presents regional architecture and art, from Romanesque and Gothic styles to the Baroque, and highlights artists, fresco cycles and other distinctive works. Its searchable listings help users find sites by municipality, cathedral or category. Città e Cattedrali supports informed visits and the ongoing appreciation of places that have benefited from study, restoration and maintenance.

Local volunteers and diocesan cultural offices contribute to welcoming visitors and keeping the portal current. Through the free Chiese a porte aperte app, users can book access to participating sites and open their doors with a smartphone; the service enables visits throughout the year