Butyrka prison
（重定向自Butyrka）
Butyrka prison (Russian:Бутырка, a colloquial term for the official Бутырская тюрьма, Butyrskaya tyurma) is a prison in the Tverskoy District of central Moscow, Russia. It was the central transit prison in Tsarist Imperial Russia. During Soviet times, it held many political prisoners. Currently Butyrka remains the largest of Moscow remand prisons. Overcrowding continues to be a problem.