After the Siege of Breslau, the Soviet Red Army took the city in May 1945. Breslau, now known as Wrocław, became part of the Republic of Poland. The first Polish team of academics arrived in Wrocław in late May 1945 and took custody of the university buildings, which were 70% destroyed. Parts of the collection of the university library were lost during the Red Army's advance in 1945, burned by soldiers on 10 May 1945, four days after the German garrison surrendered the city.