We"re looking at the rooftop of Casa Batlló, a six-story building in the center of Barcelona topped with colorful "scales." What brings us here? Well, here in the Catalonia region of Spain, and in several other locales from England to Ethiopia, it"s the feast of Saint George. You know George (or Jordi, as the Catalans call him): He"s the knight who, legend holds, saved a much-loved princess by defeating a fierce dragon. It"s said the tower jutting from the casa"s tiled roof represents George"s lance thrust into the monster"s scaly back.