The first of the Pietàs sculpted by
Michelangelo Buonarroti (1475-1564) was the one he produced in Rome around 1500, still to be admired in St. Peter's.
The Pietà you can see here in the
Sforza Castle - no longer enclosed in its long-time, splendid shell-shaped panelling, but moved in May 2015 in an autonomous exhibition room - is the last of the four (c. 1555), bought by the Milan City Council in 1952.
The art historians, Peter and Linda Murray, wrote that the "nearly abstract" - unfinished, in fact - Rondanini Pietà "is charged with an emotional intensity which contemporaries recognized as Michelangelo's
terribilità. He was working on it to within a few days of his death, in his 89th year".