Cappella di Sant'Andrea

Built c-ca 430 is the oldest building in Ravenna.

Built in between 10th–11th centuries. Inside the church is a crypt permanently flooded with water, while adjacent to it is the tomb of Dante Alighieri (on the left from the facade). Bring coins as 1 one euro coin gives 1 minute of light to see the flooded crypt with fishes swimming around.

Some remains of Roman and Byzantine buildings were excavated at the beginning of 1990s. The major one — Domus — is a 14-rooms building with 3 courtyards. The floors in these underground rooms are covered with splendid polychrome mosaics, hence the name was given to this place Tappeti di Pietra (Stone Carpets). The entrance to the archaeological site is from the 18th century chiesa di Sant'Eufemia. Adjacent 15th century Oratorio dei Cento Preti is also a part of the museum.

Built by the Ostrogothic King Theodoric the Great between the end of the 5th century and the beginning of the 6th century.

These ruins were an entrance to Chiesa di San Salvatore ad Calchi. A mosaic floors from the excavations of the palace proper were installed there in 1923.

Built in the 6th century as an Arian cathedral, it has been quite drastically altered since then, featuring now a Baroque façade.