Authentication, certification, and sale of autographed items

First, we evaluate the item's potential.
Then we formalize its authenticity.
Finally, we promote it to potential buyers.

Meet the expert

Mathias Meyer is a French autograph expert, active in the national and international market since 2010. He works with collectors, sellers, specialized stores, auction houses, and clubs through technical analysis, market valuation, and document certification of collectible items. He is a member of ILAB (International League of Antiquarian Booksellers), an international association that brings together recognized professionals in the rare books, manuscripts, and autographs market.

About Glórias

Examples of analyzed, certified, and sold parts

  • Mini boots signed by the 1958 Selection

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  • Large autographed portrait of Alberto Santos-Dumont (1919)

  • Autograph by Steve Wozniak (2003)

  • Handwritten letter from Carlos Gomes (1885)

  • Fashion drawing by Yves Saint Laurent (1960s or 1970s)

Certified items (from R$ 500 to R$ 120,000)

Explore a selection of rare signed pieces, chosen for their historical significance, provenance, and condition.

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Exceptional parts and assemblies (price on request)

  • Becoming Senna (in English)

    Two handwritten letters from Ayrton Senna to his best friend, totaling 25 pages, with previously unpublished drawings and photographs, dated 1979, document his time in European karting and the beginning of his journey towards Formula 1 at the age of 19.

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  • Alberto Santos-Dumont, le pionnier (in French)

    The most beautiful collection of manuscripts and photographs of Alberto Santos-Dumont brings together 30 decisive years of his life. These are rare and exceptional documents that reveal the aviation pioneer and also a man of great values. Introduction in French.

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  • Writings of the Empire

    This exceptional collection, spanning nearly a century of Brazilian Imperial history, offers an intimate and human glimpse into the lives of key figures such as Dom Pedro I, Dom Pedro II, and Princess Isabel, through handwritten letters, signed portraits, and previously unpublished drawings.

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  • Pelé 1958

    The most complete known autograph album of the Brazilian national team that won the 1958 World Cup, featuring signatures from legends such as Garrincha, Zagallo, and others, including one of Edson Arantes do Nascimento 's first signatures, writing 'Pelé'.

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  • Signed Jorge Amado

    Previously unpublished correspondence between Jorge Amado and Zélia Gattai and the Olinto couple, covering almost three decades of friendship: Jorge's daily life, the creative and editing process, adaptations for film and television, Afro-Bahian culture, and his relationship with Zélia.

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  • An unknown Mane-Katz

    This expressive portrait, discovered by chance in Brazil, is a previously unknown work attributed to Emmanuel Mané-Katz , depicting a man in a beret and blue scarf, possibly the artist Chaim Soutine . The painting is currently undergoing authentication.

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