This is a picture of the Royal Chapel of St Peter Ad Vincula, which is located in a picturesque corner of the Tower of London.
An innocuous-looking building, it's a real joy to behold from the inside. On the day we visited, there was a soft light coming through the windows and illuminating the altar. It's an almost romantic setting...if you ignore the fact that underneath the floors are the bodies of three Queens of England and a number of Dukes and Lords of the kingdom too. Most of them beheaded, naturally.