Antiga Confeitaria de Belém is commonly known as Pasteis de Belém, due to the most famous cream custard tart in the world. With a secret recipe since 1837, Antiga Confeitaria de Belém is the most famous pastry in Lisbon. During the weekend, there are huge crowds to taste this delicious tart. Try to get a table inside the Antiga Confeitaria de Belém. It is huge inside.