Introduction to GUM department store: Moscow GUM department store is located next to the east side of Red Square. It was designed by Pomerantzov and built in 1893. Today it has become one of the ten most famous department stores in the world. . The exterior of the mall presents a typical Russian-style shape, and the interior space is huge, with a total of 240 independent stores. The dome's glass roof makes the mall brightly lit, and the fountain in the middle of the first floor is a common dating place for Muscovites.