Piazza Mercanti, Milan Very close to Piazza Duomo there is Piazza Mercanti. In this square the Palazzo della Ragione is situated, also called Borlotto Nuovo, the symbol of Milanese communal period. In the opposite side there is the Loggia degli Osii: built in black and white marble, was commissioned by Matteo Visconti in 1316. Next to the Loggia there is the Palazzo delle Scuole Palatine, designed by Carlo Buzzi and built between 1644 and 1645.turkeyarena.com At the end of the square there is the Status Office, built over the remains of Panigarola House (XV century). This place is called the “Medieval Heart” of the city.