After the Bolshevik Revolution, the building became the headquarters for the Soviet secret police later called the KGB.

Lubyanka Building

The Lubyanka (Russian: Лубя́нка; IPA: [lʊˈbʲankə]) is the popular name for the headquarters of the KGB and affiliated prison on Lubyanka Square in Moscow, Russia. It is a large Neo-Baroque building with a facade of yellow brick designed by Alexander V. Ivanov in 1897 and augmented by Aleksey Shchusev from 1940 to 1947.

• http://en.wikipedia.org/wiki/Lubyanka Building