Description said: "Glass Ceiling: Teatro Colon." I was sure it wasn't Gaudi's but need to do some research before I pinned it. Teatro Colon is in Buenos Aires, and Gaudi never crossed the Atlantic... If someone knows the name of the stained-glass designer I'll appreciate it. And if some can confirm that's Teatro Colon in Buenos Aires, I'll appreciate that too! Thanks!
While the interior of St. Vitus Cathedral in Prague is very beautiful, the stained glass windows are of special note. Alfons Mucha, the Czech Art Nouveau painter, was responsible for the new stained glass windows in the north wall of the cathedral during the 20th century. (Link)