A collection of 18,000 books defined the scholarly life of Giuseppe Valletta, a Neapolitan intellectual whose private library became a repository of immense cultural value. Active in the final decades of the 17th century, he operated as a lawyer, jurist, and philosopher in a period defined by shifting boundaries between traditional theology and emerging scientific inquiry.
Early Education and Career
Born in Naples in 1636, Valletta received his foundational training in literature under the instruction of the Jesuits. Although his early education focused on classical studies, he later transitioned into the field of law. This professional grounding as a jurist and lawyer allowed him to navigate the complex social and intellectual environment of his native city, establishing a reputation as a scholar with broad interests.
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In 1663, Valletta joined forces with Francesco D'Andrea and other local intellectuals to establish the Accademia degli Investiganti. This organization functioned as a catalyst for cultural reform in southern Italy. Collaborating with thinkers such as Tommaso Cornelio and Leonardo Di Capua, he engaged in the era's contentious philosophical and scientific debates, consistently aligning himself with progressive viewpoints against conservative factions.
Institutional and Editorial Contributions
Valletta used his resources to influence local pedagogy and letters. In 1681, he funded a chair for ancient Greek at the University of Naples, appointing his tutor Gregorio Messere to the position. His editorial work included the 1687 release of Francesco Redi’s Bacco in Toscana and a complete edition of Redi's works. His own primary writings included the 1691 piece, Lettera in difesa della moderna filosofia e de' coltivatori di essa, and his Historia filosofica, published between 1697 and 1704.
Library Legacy
His massive personal archive, recognized by contemporaries as the Helluo librorum et Secli Peireskius alter, reflected his devotion to the accumulation of knowledge. Following his death in Naples in 1714, the collection was preserved through the intervention of Giambattista Vico, who facilitated its incorporation into the Biblioteca dei Girolamini.
Fast facts
- Born: 1636, Naples
- Died: 1714, Naples
- Occupations: lawyer, jurist, philosopher
- Notable work: Lettera in difesa della moderna filosofia e de' coltivatori di essa (1691)
- Notable work: Historia filosofica (1697–1704)
- Library size: 18,000 books
- Academy: Accademia degli Investiganti
Questions readers ask
What happened to the library of Giuseppe Valletta?
After his death, Giambattista Vico ensured the collection was merged into the Biblioteca dei Girolamini.
Which academy did Valletta co-found?
He co-founded the Accademia degli Investiganti in 1663 alongside Francesco D'Andrea.


