What's so unique about the El Ateneo bookstore in Avenida Santa Fe in Buenos Aires? It is so distinctive because of the interior of the building the store resides in. The magnificent building was conceived as a theater in the first place. Back in 1919, the Grand Splendid Theater was inaugurated and had been a place of activity for only a few years. In 1929 the theater was converted into a cinema which existed for more than 80 years. In the late 1990s the building once more was converted into the exceptional bookstore you see in the picture.