The test, which covered the Russian revolution, was supposed to include an image of the painting Storming the Winter palace on 25th October 1917 by Nikolai Kochergin.

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The famous art historian and scholar Giorgio Vasari, writing in the second edition of his Lives of the Artists in 1568, mentioned that Pinturicchio's painting was "over the door of a room in the Apostolic Palace".

BBC: NEWS | Europe | Fresco fragment revives Papal scandal