[2][3] On the façade there are numerous Arab or Byzantine ceramic plates also present in the other Romanesque churches in Pavia, such as the Basilica of San Pietro in Ciel d'Oro.

[5] On the left wall of the transept there is the fresco depicting the cycle of the stories of San Teodoro, made by an anonymous Lombard artist in 1514 as part of the renewal of the decoration of the church commissioned by Luchino Corti, as attested by the inscription placed in the upper frame.

[6] In front of the crypt there is a polychrome marble statue of San Teodoro dating back to the fourteenth century, which bears the symbolic representation of the city of Pavia.

[7] In the first span of the left aisle, behind the baptistery, there are two views of Pavia, the first, completed, was torn and brought back to canvas in 1956, since during the restorations it was realized that it concealed a second unfinished fresco (with the same theme).

The views were commissioned by the parish priest Giovanni Luchino Corti as a civic ex voto for the victory in the siege of 1522 (in that year the city was besieged by the French, who were however defeated) and were, perhaps, made by Bernardino Lanzani or by an anonymous Lombard artist (defined by critics as Master of the Stories of Sant'Agnese) between the 1522 and 1524.

[8] In 1998, during the works for the reconstruction of the heating system, in the first bay of the right aisle, a 12th century mosaic was discovered with scenes surrounded by bands with decorative and iconographic motifs typical of the Romanesque repertoire.