On the northern side of Plaza de Armas we find City Hall, another neoclassical structure built between 1604 and 1789, that resembles Madrid’s City Hall in Spain.
This building is the only one in San Juan with an archway entrance spanning the entire width of the structure. This is an important detail because colonial law specified that all buildings surrounding mayor plazas had to include archways.
Another interesting fact is that Old San Juan is one of the few towns in Puerto Rico whose cathedral or Catholic Church is not across the square from City Hall.
City Hall has a tourist information center on the first floor and a small gallery with itinerating exhibits. Admission is free.