Outside the city walls, located at the very centre of the amphitheatre, the remains of the Church of Santa Maria del Miracle, or Our Lady of the Miracle, can still be seen. The temple, whose current remains date from the 12th and 13th century, has a Latin-cross floor plan with a single nave, flat chevet and transept. A dome with concave triangular pendentives is positioned over the cross. The nave is divided into four sections, delimited by engaged columns and reinforcing ribs that support the pointed arch. The entrance used to be located on the northern wall, which was made of marble. The decoration is quite simple, including interior engaged columns crowned by smooth capitals. A piece depicting the Virgin with the Christ Child from this church dating from the second half of the 14th century is now held at the National Archaeological Museum.

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