It has been more than 20 years since secret KGB were leaked from Russia. The files number in the thousands and comprise what the FBI has called “the most complete and extensive archive of espionage we have ever had from any source.” The documents include KGB information on secret Russian weapons, caches, Russian spies, and information on the activities of Pope John Paul II. They are known as the Mitrokhin Files, and are now available at the Churchill College.
The files were leaked by Vasiliy Mitrokhin, who worked in a KGB intelligence archive between 1972 and 1984. During his time there, Mitrokhin is said to have had free access to hundreds of thousands of confidential files. Eventually, when he came into conflict with the Soviet government, he began copying the documents and smuggling them in his shoes and jacket pockets. Mitrokhin then hid the files, which remained hidden until he revealed them in the UK in the 1990s.
But from today you can find them online.

