King Jaume I appointed in the XIII century 8 counselors who helped him to govern his kingdom. Each of these 8 counselors was to appoint others until the number of 100 counselors was reached. Later we will see the importance of this number. Originally, the meetings of these councilors took place on the stairs of the Palau Reial Major and, as result of lacking space, were held in other buildings as well until they decided to buy the buildings they needed and configure with them the space they required. More or less this is known today as the “Casa de la Ciutat de Barcelona”.

The current building is a place which principal façade was created in 1847 in the Neo-Classical style. In the Ciutat street we will find the antique gothic-style façade from the year 1399 that was used as principal entrance until the Neo-Classical façade was constructed. Between the XIII and XIV century the “Salon de los Cien Jurados” or Hall of the 100 Counselors was built, it was here where the meetings were held.

Also in those years they built the inner patio, the chapel, the election hall and the patio of oranges. All, except the patio of oranges, is still well conserved, some with later renovations.