Rossio
The formal name for this grand public square is Praça Dom Pedro IV, but locals still call it Rossio. A gathering place since at least Roman times (it was the site of a hippodrome), it was formally laid out in the 13th century as Lisbon's main public space. Crowds socialize beside baroque fountains beneath a statue of Dom Pedro atop a towering column and amid dramatic wave-pattern cobblestones, famously reconstructed on the beach promenades of Rio de Janeiro.
On nearby Largo de São Domingos, there's a memorial to Jewish victims of a massacre in 1506, when Dominican friars egged on the mob; just three decades later centuries of more organized persecution began with the creation of the Portuguese Inquisition, which had its headquarters where the Teatro Nacional Doña Maria II now stands, on the north side of Rossio. The atmosphere today is more peaceable: locals come here to relax with a newspaper, have their boots polished by the shoe shiners, or sip a drink at one of the ginjinha bars—the one on the southern side of the square is probably Lisbon's oldest.