We’ve tried to make out the caption at the bottom left of this unmailed old real-photo postcard:  “ROMA – S. Giorgio in Velabro – Baldacchino”.  So this guides us to tell you what you’re seeing:  “A baldachin, or baldaquin, is a canopy of state typically placed over an altar or throne. It had its beginnings as a cloth canopy, but in other cases it is a sturdy, permanent architectural feature”.  The card has a written explanation of something in the message area.  Grade: 4