Pedro Corrêa do Lago (born March 15, 1958) is a Brazilian art historian and curator who has formed the largest private collection of autograph letters and manuscripts in the world today.

[12][13] The subject of his 2003 book entitled True to the Letter (published in five languages),[14][15][16] the collection has since grown to become the most comprehensive in the six areas focused on by Corrêa do Lago: art, literature, history, science, music and entertainment.

[17][18][19][20] Significant pieces from personalities such as Newton and Einstein, Mozart and Beethoven, Van Gogh and Picasso, Joyce and Proust, Henry VIII and Gandhi, Chaplin and Disney are present in the collection, which will be shown to the public for the first time from June to September, 2018, at The Morgan Library & Museum in New York when 130 selected items will be exhibited.

He is responsible for leading teams that have conducted the primary research on the most important foreign artists active in Brazil before the 20th century, including Frans Post and Jean Baptiste Debret.

[22][23][24] In 2008, the couple located with a noblewoman in Europe the lost photography collection of Princess Isabel, regent of Brazil, who went into exile in 1889, and revealed its one thousand images in a book published the following year.

[27] While he was able to reorganize important services within the institution[28][29][30] and create an influential monthly illustrated magazine on Brazilian history ''Revista de Historia da Biblioteca Nacional'' [pt] (in Portuguese),[31][32][33] his tenure was marked by strong opposition by the leaders of the union of the library's employees, some of whom were deprived of irregular benefits granted by previous administrations, which were disallowed by Corrêa do Lago.

[34][35] In mid 2005, during a three-month strike by the public servants of the Ministry of Culture (which forced the National Library to be closed during that entire period),[36] a theft occurred of rare items including photographs, prints and drawings (which were later mostly recovered).