Town councils of the world take note: if you're going to build a public library (which you should), then please make it look like this one. Installed inside the magnificent 16th-century Ex-Templo de la Compañía de Jesús , the shelves of the city's breathtaking university library rise up toward the domed ceilings and are crammed from head to toe with thousands (22,901 to be exact) of dusty, antique books recounting the histories of kings and queens, Spain, Europe and the colonies.