And finally, closing off the piazza to the east is Palazzo dei Banchi, where the money changers and bankers worked. Designed by Vignola and built at the end of the 16th century, it has a very simple facade. Its purpose was to elegantly mask the humble construction that faced the piazza while retaining the pre-existing road connections that converged here. It wasn?t until the 15th century that the piazza took its present shape. In the 16th century the area was restored at the behest of the pope.