The Magdalen Chapel is one of the oldest chapels in Edinburgh, build in the late 1500's and located near Cowgate and not far from Grassmarket. It is not normally open to the public and has strict opening hours, but during Edinburgh Festival season in August I had the chance to free entrance and a wee look around.
I believe that they also hold mass so that anybody can join.
It is very small inside and you can easily get claustrophobic. There is a room with wood panels, amazing colorful glass windows and kind of grave "stones" (I would not call it stone, but rather made out of wood, engraved with names of many....)
Nowadays it is the Headquarter for the Scottish Reformation Society, but its origins lie with being founded as a catholic worshiping place.
If you are nearby, have a look and learn about the religious past. read more