Plans for a 16-storey City Hall on the east side, resembling the Moscow State University main building, were not carried out following de-Stalinisation.

[3] The lot in the centre of the city, damaged by the bombing of Sofia in World War II, was cleared in the autumn of 1952, so that the construction of the new buildings could begin in the following years.

[3] The Party House building, once crowned by a red star on a pole, was designed by a team under architect Petso Zlatev and completed in 1955.

In the 1990s there have been suggestions to reshape the former Party House, sometimes regarded as an imposing remnant of a past ideology,[4] by introducing more modern architectural elements.

The lawn and the flags in the centre are replaced by glass domes, so that the ruins of the ancient Thracian and Roman city of Serdica can be exposed in an impressive way, thus becoming a tourist attraction.