A twelfth century monk writing the history of Rome wrote passionately about the political dramas and intrigue that took place on Capitoline Hill, the center of the universe, home of the senate etc etc. Of course none of this was true, as that all took place in the Forum, and the Capitoline Hill had only one real function, holding the main state temple to Jupiter, where the emperor would come to perform rituals. Nonetheless, the monk had a good PR agent, and it became firmly established that Capitoline Hill was in fact the seat of government, giving the world, obviously, the word capitol. It also convinced the medieval Romans that they should re-establish their government seat on the Capitoline, so, accidentally, it did become the Roman capitol. They enlisted the services of Michelangelo to design the whole government complex, which housed the new Roman senate. Like the ancient senate of Rome, the institution rarely accomplished anything since the city was firmly under the thumb of the pope, but it did give old people a place to talk.