Built by Antoninus Pius, successor of Hadrian after whom the temple is named, Temple Of Hadrian was much once decorated with trophies and reliefs of the conquests (the relics now lie in a near by museum). Today only the 11 pillars at the north end remain. These pillars were integrated in the 17th century to make a new customs office. Today, there resides the Roman Stock Exchange within it. A superimposition of the modern on the ancient- that is pretty much what Temple of Hadrian is.