How do you walk inside a building that has been gone for nearly a millennium? For Italian artist Edoardo Tresoldi, the solution was to rebuild it. A sculptor, Tresoldi reconstructed the basilica of Siponto, on the Adriatic coast of Italy, a church destroyed by an earthquake in the 13th century along with the surrounding town, which itself dated back to the second century B.C. But Tresoldi built the new version of the church as a ghost of its former self, using 4,500 square meters of wire mesh weighing 7 tons. The spectral structure has been drawing crowds to the archaeological site since it was erected in early March.