Complex sentence: Built between 1474 and 1520, on designs by the Florentine Giuliano da Maiano, it was raised atop the base of a prior church, and dedicated to St. Peter.
Split into simpler sentences: Built between 1474 and 1520 based on designs by the Florentine Giuliano da Maiano. It was raised atop the base of a prior church, and dedicated to St. Peter.