THE STORY THROUGH PHOTOGRAPHS.

Anna Pavlova as the Dying Swan

Anna Pavlova at the last Imperial Ball in 1903

Anna Pavlova dancing with an elephant in Hamberg

Sergei Diaghilev

Statue of Anna Pavlova atop the Victoria Palace Theater in London

Ballet Russes costume designed by Pablo Picasso for Parade

Twenty-three-year-old Joseph Stalin in 1901

Statue of Anna Akhmatova opposite Kresty Prison on the River Neva

The Lubyanka Prison

"The Poison Dwarf" Nikolai Yezhov walking with Stalin

The same photo retouched to exclude Yezhov after he fell from favor and was executed

Raoul Wallenberg, a Swedish architect who saved the lives of thousands of Jews during the Holocaust. After going missing during the Siege of Budapest, he was murdered in Lab One.

The assassin Yakov Serebyransky, "Uncle Yasha," in 1941

Stalin's corpse, next to Lenin's corpse, after it was exhumed on Halloween, 1961

Former FSB officer Alexander Litvinenko on his deathbed after being poisoned in London

Nobel Peace Prize-winner Liu Xiaobo and his wife shortly before his death after years in prison

Chinese President Xi Jinping

The Wuhan Institute of Virology