The new cathedral, with a cloister, was built against a steep hillside, and a new point of access from the town below was needed. A new porch was built on the west side just below the cathedral, with a stairway leading up to the nave. In the 12th century, this lower porch was enlarged with the construction of two new chapels, and the portal was given large doorways of cedar wood, and the monumental west front covering the porch was constructed with a decoration of multicoloured stone. From the porch at the bottom to the nave at the top. All of the structure was decorated with multicolour stone and fresco painting.