Get in touch with your spiritual side and meet other worshippers at Igreja de Nossa Senhora da Piedade. Quietly reflect outside for a few moments or ask if you are allowed to join the next service.
Situated in Centro / Baixa, this house of prayer is worth a look. But you'll find a great deal more to explore in the area. Sandeman Cellars, Porto Cathedral, and Casa da Musica are within easy reach of Igreja de Nossa Senhora da Piedade.