It's often interesting to delve into differing beliefs. A trip to Cardaes Convent is a good way to appreciate a part of the local way of life.
You'll soon learn why this Lisbon Old Town house of prayer is visited by many travelers. If you're looking for other things to keep you busy, Castle of São Jorge, Rossio Square, and Belém Tower are in this area too. They won't take you long to reach from Cardaes Convent.