The Iglesia del Sagrario is part of the complex formed by Seville Cathedral but is actually a separate parish church, though built to Cathedral-like proportions. It is rather more austere and less ornate than the interior of the Cathedral and, in my view, rather the better for it. The main dome was hung with sheets, presumably as part of a restoration programme but whilst restoration works usually hide the things you most want to see, the gauze sheets I found added something to the view.