Identification Needed Now Found

Any idea where this is? I find it is an amazing visual that I should have seen at some point before. The person who found it Googling didn't make note of what it was and the search he gave me proved unfruitful.

Update: Someone called it the Bishops Door, and that led to a Google search where I found it as the door to St. Nicholas Cathedral in Ljubljana, Slovenia. And a picture with the door actually open.