Complex sentence: The transept, including five spans, has the same width and height of the nave; in the crossing is a tall octagonal lantern tower, surmounted by a bell tower, also octagonal, which ends with a pyramidal cusp in brickwork.
Split into simpler sentences: The transept, of five bays, has the same width and height of the nave. At the crossing is a tall octagonal lantern tower, surmounted by a belfry, also octagonal, which ends with a pyramidal cusp in brickwork.