With roots in the 17th century, this is one of the oldest streets in Quebec, but there are few buildings left from that time. It's named after the gate of Saint-Louis, which the street connects to Place d'Armes. Albeit touristy, walking along it is still an interesting experience.
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Monastère des Ursulines de Québec
The monastery comprises a whole block in the old town, though only the chapel and the museum are open to visitors. It was founded in 1639 by the French nun Marie de l'Incarnacion (later canonized) as the first female Catholic order in the Americas. The chapel dates from 1730 and is with its wooden altar considered a masterpiece of Franco-Canadian woodwork. In the museum you can learn about the activities of the Ursuline order in Quebec throughout history, and on display there are things related to its curriculum such as embroidery and musical instruments. Also the museum, in a building from 1687, has beautiful details preserved since construction including wooden staircases and windows.
Built in 1737, and named after its first owner, Jean-Baptiste Maillou, this well-preserved simple brick house is a good example of how Quebec looked in the 18th century.
Palais de justice de Québec
A neoclassical grand building next to Place d'Armes by Eugene-Etienne Tachet and finished in 1877. The current tenant in the building is the provincial ministry of finance.
This neoclassical cathedral is the seat of the Anglican diocese of Quebec. It was consecrated in 1804 as the first Anglican cathedral outside the British isles and is the third largest church in the city.