Carl von Gontard designed the city side, his pupil, Georg Christian Unger, the field or countryside-facing side. Gontard made the city side as a rendered facade with Corinthian-style lesenes and trophies, Unger designed the field site in the style of the Arch of Constantine with Corinthian double-columns and ornamentation like the golden trumpets. The two side entrances for pedestrians were not added until 1843, under Frederick William IV, in order to cope with the increase in pedestrian traffic.