La Seu Nova, Lleida's working cathedral, stands in the lower city not far from the Segre river. It was begun in the eighteenth century to replace La Seu Vella after the old hilltop cathedral was handed to the army — the city needed a functioning place of worship, and the result is a large Baroque building that took well over a century to complete. It lacks the drama of its predecessor on the hill, but the interior is spacious and calm, with a decent collection of religious art and a cloister that makes a quiet refuge from the streets outside.
Worth visiting if you are already in the lower city and curious about how ecclesiastical architecture shifted from the Gothic grandeur of the old cathedral to the more measured Baroque manner of the eighteenth century. The contrast with La Seu Vella, visible on the ridge above, is instructive.