Piazza Vecchia – Old town Square, located in the so-called Upper Bergamo, is a recognized symbol of the city. It was created in the early 14th century, and its present form was acquired during the reign of the Venetian Republic. In the southern part of the square is dominated by the Palazzo della Ragione, built in the time of the independent commune of Bergamo, City Tower, built in 12-15-th centuries and is also known as the Campanone – "great bell" and the ancient Domus Sardaran (14th-15th centuries), now owned by the University of Bergamo. From the North area covers the 17th-century white marble facade. It was built for city hall, and today it houses the city library Angelo Mai, which holds over half a million volumes of books. Completes the elegant ensemble Piazza Vecchia fountain, a gift in the 18th century by the Venetian podestà Alvise Contarini and bears his name.

Just behind Piazza Vecchia is another, not less important, the town square is Piazza Duomo with its numerous monuments. So, here you can see the Cathedral of Bergamo, built by the architect filarete and rebuilt several times. The decorations of its interior decoration was completed only at the end of the 19th century. Attraction of the Cathedral is the chapel of the Crucifixion the crucifixion 16th century and the apse with seven paintings by Tiepolo.

There, on the Piazza Duomo, an ornate Basilica di Santa Maria Maggiore, with its famous lion's gate – the Porta dei Leoni Bianchi and Porta dei Leoni Rossi. Next to the Basilica is the Chapel of Colleone, built in the 15th century by the architect Amadeo. The chapel is the mausoleum of the famous condottiere Bartolomeo Colleoni and his daughter. On the side of the Chapel is visible staircase leading to the entrance to the Bishop's Office. After passing through the richly frescoed Room of the Administration – Aula della Curia (11th-12th century), you can get into a small courtyard with a small temple in the centre, built in the 11th century. Finally, it is worth considering the building of the baptistery. It was built in 1340, the year the architect Giovanni da Campione as part of the Basilica of Santa Maria Maggiore. However, it was later remade in a separate building. The interior of the baptistery is decorated with reliefs depicting Christ.