The current Cathedral of Porto underwent construction around 1110 under the patronage of Bishop Hugo and was completed in the 13th century.
The cathedral is flanked by two square towers, each supported with two buttresses and crowned with a cupola. The façade lacks decoration and is rather architecturally heterogeneous. It shows a Baroque porch and a beautiful Romanesque rose window under a crenllated arch, giving the impression of a fortified church. The Romanesque nave is rather narrow and is covered by barrel vaulting. It is flanked by two aisles with a lower vault.