Funeral monument known as tomb of Regina della Scala Detail of

The sarcophagus comes from the crypt of San Giovanni in Conca
  and is generally dated around 1384, as it is traditionally considered to be the
  tomb of Regina della Scala, wife of Bernabò Visconti, lord of Milan from 1354
  to 1385, who died that year. Originally it was supported on four pillars, only replaced by
  the current six octagonal columns when it entered the civic collections. The
  front is tripartite, with in the centre Christ as the suffering Redeemer
  between two angels holding curtains, flanked by busts of St. John and St.
  Luke.