This is a very old unused black and white/sepia postcard of Milano - Torrione del Castello. I have no idea of the exact age of the card, but it looks like it is from the very early 1900s - at the foot, it reads "5415 Garzini a Pezzini - Milano - 1901".  It is a Carte Postale D'Italie and it is in very good condition – no creases or obvious marks (other than a couple of minor ones, including faint album marks), even the corners remain mostly sharp.