Originally covered in delicate mosaics, this dome in the Church of the Holy Saviour in Chora, Istanbul, hasn't survived untouched. But the beauty of the underlying structure is still very apparent, I think.
What was once, still remains - Istanbul Easter 2013 DSC_2272 by PowderPhotography, on Flickr
What was once, still remains - Istanbul Easter 2013 DSC_2272 by PowderPhotography, on Flickr