In the late 1980s and early 1990s during Perestroika, freedom of expression allowed the leaders of the Soviet Union to become a common theme of the matryoshka, with the largest doll featuring then-current leader Mikhail Gorbachev. These became very popular at the time, affectionately earning the nickname of a "Gorba" or "Gorby", the namesake of Gorbachev. With the periodic succession of Russian leadership after the collapse of the Soviet Union, newer versions would start to feature Russian presidents Boris Yeltsin, Vladimir Putin, and Dmitry Medvedev.