Like the Forth Bridge, the Palace of Westminster, with its cast iron Victorian roofs, its Neolithic heating systems and endless need for maintenance and repair will be crawling with builders and craftsmen rather than politicians - the institution it houses, though, is in unexpectedly good order.
He approaches the problem from different angles: there is a historical epic, then the story of how that epic itself was cast and shot, then a delving into the lives of its performers, and so forth.