The Real Alcázar of Seville, Spain is a royal palace built originally for Moorish Kings. Unlike the possibly more famous Alhambra of Grenada which was looted, occupied by squatters, the upper levels of the Alcázar are still used by the royal family as the official Seville residence. This photo shows the detail of an elaborate golden dome in this Moorish historical fortress. I believe the blue squares might be tiles that are more blue than the others to give a better perception of sunlight shinning in.