Just south of the railway station, there is a building of the Post Office No. 6. Originally built as the Post Office No. 2 in the 1920s, it was constructed by architect Momir Korunović. Due to the extravagantly ornamented façade, it was called "architectural beauty" and considered one of the most beautiful buildings in Belgrade and among Korunović's best works. It was damaged during World War II and reconstructed later. However, the new, Communist authorities considered its façade "too bourgeois" so they removed the remains of the façade and reconstructed only the skeletal architecture under it, which suited the style of the Socialist realism which was pushed by the government in the immediate post-war period. As such, the façade has been described as a "skeleton and unsightly". Ukrainian émigré architect, and informant of the OGPU (later NKVD), Pavel Krat, was given the task of reducing the façade to the basic social realistic style. He referred to the Korunović's design as the "typical example of unsuccessful use of our folk architectural heritage, overloaded with stylish elements".