A document from the collection of letters from the papal nunciature in Spain of the years 1670-1675, kept in the Archive of St. Petersburg Institute of History of the Russian Academy of Sciences, can tell about an amusing episode in Spanish and Latin American history. In the program “Autograph of History”, Ph.D., researcher of the Department of General History Pavel Valentinovich Krylov, about a letter that fell into the very center of the interweaving of interests very far from the Peruvian shores and the Andean mountain ranges.