Fodor's Expert Review Palazzo dei Diamanti

Named for the 8,500 small pink-and-white marble pyramids (or "diamonds") that stud its facade, this building was designed to be viewed in perspective—both faces at once—from diagonally across the street. Work began in the 1490s and finished around 1504. Inside the palazzo is the Pinacoteca Nazionale which houses 13th- to 17th-century Ferrarese painting, plus temporary shows.