It’s well worth venturing west beyond Lisbon’s central squares (Rossio Square and Praca do Comercio) to reach Jerónimos Monastery. It’s a prime example of Manueline architecture, a style unique to early-16th-century Portugal and reflective of the Portuguese empire at its opulent height. If you arrive first thing in the morning or at late afternoon, you have the best chance of avoiding the otherwise exceptionally long lines here. And while you’re in the neighborhood, seek out Torre de Belém, dating from the same period, and a landmark of the culinary sort: Pasteis de Belém (est. 1837).