Hidden beauty

In downtown Belgrade there are many modern buildings and also many old ones. The facades and stairways of the latter are either well maintained if the owners have the money to do so, or else are left to slowly deteriorate. I amuse myself by peeking through doorways of the more dilapidated buildings to see if it's worth a closer look inside. Often it is, as you can see by this treasure of a ceiling I found. Click on the photo to enlarge and appreciate the artwork more.