context: The overall project was Domenico Trezzini; the upper floors were designed by Theodor Schwertfeger. In the XVIII century, the building was occupied by the highest government bodies. After the dissolution of the colleges, they were replaced by the Main Pedagogical Institute and St. Petersburg University.
question: Who designed the building of the twelve colleges in St. Petersburg?
answers.text: Domenico Trezzini; the upper floors were designed by Theodor Schwertfeger