The City Hall is in the heart of the Old Quarter of the city, and its site is not a coincidence. In 1423 King Carlos III (‘el Noble’) of Navarre enacted a law called ‘El Privilegio de la Unión’ (Privilege of the Union) to put an end to centuries of bickering and confrontations between the three boroughs and located the building on the spot where the three boroughs that existed at the time (Navarrería, San Saturnino and San Nicolás) came together. The building has been renovated on a few occasions, the last in the middle of the 18th century, but none of the changes have affected its beautiful and colorist façade, where the Baroque and neoclassical styles merge.