Tunnel to Basílica de San Pietro in Vincoli | Roma, Italia

This tunnel leads to the beautiful Roman church, Basílica de San Pietro in Vincoli (Church of Saint Peter in Chains), just off Cavour street. The church is filled with stunning Renaissance artwork, including Michelangelo's Moses sculpture. I noticed nice rooms above the tunnel:

Canon EOS 40D and EF-s 17-55 2.8 IS USM