The Lamego Cathedral, was founded in 1129. It is a Gothic cathedral, keeps the original square tower, but the rest of the architecture reflects changes made in the sixteenth and eighteenth centuries, including a Renaissance cloister with a dozen well-proportioned arches.

In the twelfth century, after the restoration of the Diocese of Lamego, the construction began of a larger temple. Its location became effective on Rossio Lamego, in the lower zone of the future metropolis, and began in the year 1159. Sacred in 1175 the Santa Maria and St. Sebastian, the likely conclusion of the See would only happen in 1191 . However, the various ages of history undertook to change significantly its original Romanesque profile.