Lenin died in January 1924. Stalin took charge of the funeral and was one of its pallbearers; against the wishes of Lenin's widow, the Politburo embalmed his corpse and placed it within a mausoleum in Moscow's Red Square. It was incorporated into a growing personality cult devoted to Lenin, with Petrograd being renamed "Leningrad" that year. To bolster his image as a devoted Leninist, Stalin gave nine lectures at Sverdlov University on the "Foundations of Leninism", later published in book form. During the 13th Party Congress in May 1924, "Lenin's Testament" was read only to the leaders of the provincial delegations. Embarrassed by its contents, Stalin offered his resignation as General Secretary; this act of humility saved him and he was retained in the position.