In 1888, an Italian scientific society sent an honorary letter to Princess Isabel to recognize her humanitarian role in the Golden Law (Lei Áurea).

• A letter from the Recognition Society to Princess Isabel and three other printed documents (two in Italian, one in French) explaining the history, rules, and workings of the Society.
• The handwritten letter has one sheet and one handwritten page.
• In Italian.
• 21 cm x 29 cm.
• November 4, 1888.
• Naples, Italy.
• Excellent condition.
• Unique set.

The letter, sent from Naples in November 1888, communicates an official decision of the Società Internazionale d'Incoraggiamento, granting its recipient an honorary diploma in recognition of her humanitarian merits. The text praises her contribution to the progress of civilization and the good of humanity, highlighting that the distinction was awarded according to the institution's regulations and sent as a token of esteem and recognition. It is a formal document, on letterhead, with an official stamp and ceremonial language typical of 19th-century academies.

The author of the letter is the Società Internazionale d'Incoraggiamento itself, a Neapolitan cultural and scientific entity dedicated to promoting science, literature, the arts, industry, and humanitarian acts. Inspired by the academies of technical and moral progress of the 19th century, the Society granted honorary titles to personalities considered exemplary, celebrating achievements that contributed to social and civilizational advancement. Its correspondence had institutional value and represented international recognition of the actions of its honorees.

The recipient is Princess Isabel of Brazil, a central figure in Brazilian history and responsible, as regent, for signing the Golden Law on May 13, 1888, which officially abolished slavery in the country. Her reputation as a defender of the abolitionist cause projected her internationally as a symbol of humanitarian progress, which is why several foreign institutions sent tributes and distinctions after abolition.

This letter is interesting because it represents an immediate European echo of the Golden Law (Lei Áurea), bearing witness to the international recognition of Princess Isabel's most emblematic humanitarian action.