The Colonne di San Lorenzo (Columns of St. Lawrence) is one of the most important remains of the ancient world in Milan. They were probably originally part of a pagan temple or baths and probably date from the 2nd century AD.

Colonnade of 16 columns

During the 4th century, the columns were moved to their current location to form a colonnade of 16 Corinthian columns in the square in front of the Basilica of San Lorenzo. At the southern end of the colonnade is an ancient gateway with decorations made of marbles that date back to the time of ancient Rome.

The square with the columns was rebuilt in its present form during the 16th century to commemorate the arrival of King Philip II of Spain in Milan.