This is a very old unused colour postcard of Bruges - Eglise Notre-Dame, Tombeau de Marie de Bourgogne. I have no idea of the exact age of the card, but it looks like it is from the very early 1900s.  The card has a slightly rippled effect - there is paper attached to the reverse, so it may have been adhered within an album at some point. Other than that, it is in good condition – no creases or obvious marks (apart from a couple of minor ones).