Whether you've come to quietly reflect or find out about the history of the building, Igreja da Santissima Trindade is a popular site to visit. Check to see if this sanctuary is open to visitors to experience the calmness inside.
When you've spent a bit of time at this house of prayer in Leiria, why not check out Leiria Castle, Dr. Magalhaes Pessoa Stadium, and Leiria Cathedral? They're not very far from Igreja da Santissima Trindade and also a favorite with travelers.