Galina Ulanova, Maya Plisetskaya and Natalia Makarova, artists from what was the Soviet Union, have what else in common?

Answer 1

They are each recognised as prima ballerina assoluta
To be recognised as a prima ballerina assoluta is a rare honour, traditionally reserved only for the most exceptional dancers of their generation; only 13 ballerinas have been recognised with the title. Makarova defected to the West in 1970; Ulanova and Plisetskaya remained in what became Russia.