The layout of Carrer Llibreteria is the same from the founding of the “Colonia Iulia Augusta Faventia Paterna Barcino”, the beginnings of Barcelona. The city was founded after the Cantabrian wars ended, from the 19 BC. The legions that had taken part in this military campaigns, built the city and it is likely they settled here, becoming its first inhabitants. The city was built from scratch, following a division plan and a predesigned map mirroring Rome’s street map. During Roman times, every city design had two main axis, the cardo and the decumanus. The present layouts of Carrer Llibreteria and Carrer del Call still follow the Roman cardo’s layout. This axis went from north to south through the city and was the continuation of the Via Augusta Maritima, the main overland commercial route was used by both, people and goods. Following this road, one could get into Barcelona through the north-east gate, located by Llibreteria street and plaça de l’Angel. There are no archeological remains of this gate, however it is known that it was flanked by two towers with a square plan.
At the intersection of the cardo and the decumanos in Barcelona (the decumanos is the axis drawn by modern days carrer del Bisbe and carrer Ciutat) is where the public space of the city was located. In other words: the forum was in the space between Sant Jaume square and Paradís street. The forum was a big gathering space in traditional Roman cities where main civilian and religious activities took place. It was a multifunctional space, a market place, but also it is where the church was, the religious centre, the Curia, and the building where the citizens’ meetings took place. The forum was built over a rectangle-shaped square and in one of the sides there was the temple dedicated to the emperor Augustus. During the middle ages, the temple was little by little dismantled, however four columns are still preserved and they can be admired in Paradís street, inside the Centre Excursionista de Catalunya headquarters.