Free time in the historic center of Sintra. Sintra is a testament to almost every era in Portugal's history. And it goes far beyond that, Sintra is a find of vestiges of the history of Humanity itself. From the Paleolithic and Neolithic to the Bronze and Iron Ages, passing through the Roman Period, then the Muslim domain, from the foundation of Portugal (on January 9, 1154, D. Afonso Henriques grants a charter to the town of Sintra) to the Discoveries, Sintra, which survived the 1755 earthquake, has its golden period between the end of the 20th century and the end of the 20th century. XVIII and the whole century. XIX.