Grumpy Old Geeks Companies El Ateneo Gran Splendid Company El Ateneo Gran Splendid 2 mentions in 1 episode El Ateneo Gran Splendid is a Buenos Aires bookstore housed in a converted theater. Mentions 171: Faradayspotting Aug 5, 2016 1:25:35 It's a bookstore called El Ateneo Gran Splendid. 1:25:53 this bookstore, which you have to go to the website. And see the pictures is unbelievable.