<prompt> Translate the following text to EnglishPiazza del Campo, pia inajulikana kama Piazza del Campo, ni eneo la zamani la Roma na uwanja wa mbio za farasi za Palio za kila mwaka.  <response>: At its heart is the grand sloping fan-shaped Piazza del Campo, site of the old Roman forum and arena of the towns world-famous annual Palio horse race. 