Porto, the city that gave rise to the name of the country, derived from its Roman name “Portus Cale”, was also the capital of the Porto county. Known as the Invicta City, the result of the heroic resistance of almost a year to the siege that fell upon it by D. Miguel during the liberal wars. With pre-Roman origins, it was also occupied by Arabs for around a century and a half until it was taken over again by Christians in the Iberian reconquest. It was pivotal in the accession to the throne of D. João I, master of Avis, having played a primordial role in Portuguese monarchical history, and also another lesser-known role, as it is in this city that Infante D. Henrique, one of the most important characters, was born. of the beginning of the Portuguese discoveries.