In Milan, the medieval wall rebuilt starting from 1171 received a particular ornament thanks to a series of statues placed at the top of the main doors, works commissioned by Azzone and Giovanni Visconti, between 1336 and the mid-fourteenth century. The Tuscan Giovanni di Balduccio was called to design the entire series, but his autograph intervention is revealed only on some specimens. The sculptural complexes of the city gates have survived the wall structure and from the beginning of the nineteenth century the statues became part of the heritage of the Museum, starting with the nucleus of Porta Orientale, demolished in 1818. Recent is the entrance of the five statues placed on the Porta Ticinese aedicule, replaced by 1961 by marble copies. In addition to the Madonna enthroned with the Child and Sant'Ambrogio which offers the model of the sestiere, figures that also appear in the other groups, the sequence of Porta Ticinese presents San Pietro martire, San Lorenzo and Sant'Eustorgio, owners of the most important places of cult of that area.