The old town of Betanzos was declared a historic-artistic site in 1970. Formerly it was located inside the old medieval wall that surrounded the city and had five gates. Puerta de la Villa, the main one, was crowned by three shields today embedded in the side of a house. Although it is no longer preserved, its name is used as an entrance to the historic center. Today three gates remain standing, known as the Puerta del Puente Nuevo, the Puerta del Puente Viejo and the Puerta del Cristo.

Betanzos has two national monuments such as the Gothic churches of Santa María del Azougue and San Francisco located in the Plaza de Fernán Pérez de Andrade “El Boo”.

San Francisco has a Latin cross floor plan and inside you can see the tombs of the medieval knights that are the most interesting artistic historical element inside the temple, especially the sarcophagus of Fernán Pérez de Andrade, which is located at the foot of the temple, under the choir, and supported by a bear and a wild boar.

Santa Maria de Azougue was built between the second half of the 14th century and the first half of the 15th century. It has a basilica floor plan and three naves. The altarpiece of the altar and the capital with the only agricultural calendar of Galicia stand out.

In the Plaza de la Constitución is the eighteenth-century town hall by Ventura Rodríguez and the Bendaña Palace, from the fifteenth century and rebuilt in the seventeenth century. Next to it stands the International Center of Contemporary Art (CIEC), in the old Casa Núñez. The square is dominated by the Clock Tower, from the 16th century, which is attached to the church of Santiago.