On 24 April 1935, Bulgakov was among the invited guests who attended the Spring Festival at Spaso House, the residence of the U.S. Ambassador to the Soviet Union, hosted by Ambassador William Bullitt. Critics believe Bulgakov drew from this extravagant event for his novel. In the middle of the Great Depression and Stalinist repression, Bullitt had instructed his staff to create an event that would surpass every other Embassy party in Moscow's history. The decorations included a forest of ten young birch trees in the chandelier room; a dining room table covered with Finnish tulips; a lawn made of chicory grown on wet felt; a fishnet aviary filled with pheasants, parakeets, and one hundred zebra finches, on loan from the Moscow Zoo; and a menagerie including several mountain goats, a dozen white roosters, and a baby bear.