Some faculties and students were evacuated to Tashkent in January 1943 where they were able to hold classes. In November 1943 they restarted classes in Leningrad as well. In 1943 in Leningrad there were 250 students and 90 teachers at the Institute. The Polytechnic Institute was the only school in the besieged city that had the authority to evaluate the Kandidat (Ph.D) and Doctor of Science dissertations. Before the end of the siege the Polytechnic Institute evaluated 19 dissertations, many related to military defense. After the end of the war the Institute was rebuilt.