Turin's main square, situated right in the centre of the old part of the city. There's plenty of restaurants, bars, coffee shops and museums around, so you can easily spend several hours around this area. While taking a stroll here, you will see several monuments and attractions (Royal Armoury or Museum of Ancient Art in Palazzo Madama).
Wikipedia https://en.wikipedia.org/wiki/Piazza_Castello,_Turin
Address Piazza Castello, 10122, Torino, Italy
Coordinates 45°4'16.451" N 7°41'8.362" E