Timeline

Heritage classified

Key figures

Origin and history

The Fountain de la Grenouille, formerly called Fontaine Blanche, is a central part of the promenade de Blanchefontaine in Langres, Haute-Marne. Developed in the middle of the 17th century, it integrates into a green landscape and exploits the topography of the place to create diving perspectives on the Bonnelle valley. This fountain, the most accomplished of the city, is inseparable from its aisle of trees, initially offered by Sully in thanks for Langres' loyalty to Henry IV. Extended and embellished in the 18th century, it was described by Diderot as a "most beautiful landscape in the world".

The fountain comes from a source known since ancient times, essential for a city perched on a rocky spur without water resources. In the 17th century, architect Claude Forgeot designed a composition inspired by Italian models, with a cave, terraced basins and waterfalls. In 1678, a third basin was added, adorned with a dolphin and a triton. Between 1755 and 1758 Forgeot and the sculptor Clement Jayet gave him his present appearance, adding rocks, statues (including the eponymous bronze frog) and a Latin inscription celebrating the works.

The promenade of Blanchefontaine, created in 1657 with abalone and lime trees planted by Benjamin Le Gois, became a popular place of strolling. Despite repeated degradations (mounds, ploughers), it was enlarged in the 18th century with counterways and stone benches. Ranked a historic monument in 1906 (fontaine) and 1937 (promenade), it embodies a century of effort to combine utility, aesthetics and harmony with nature. The source, known for the hardening of steel, also attracts local cutlery.

Denis Diderot, native of Langres, evokes in his letters to Sophie Volland (1759) the charm of this place where he loves to meditate. He describes the cascading basins, lime trees and stone benches, highlighting the beauty of the landscape and its role as a romantic rendezvous. The fountain, although losing its original utility use, remains a unique architectural and landscape heritage, regularly restored to preserve its historic character.

Access to the fountain has evolved: initially accessible from the driveway, the modern road network has changed its route. Today, she discovers herself from Bel Air Square or United States Square, offering a visual and sound experience studied (cascades, water jets). The centuries-old linden trees, renewed in 1976, and the stone benches perpetuate its role as a place of relaxation and contemplation, between ancient town and preserved nature.

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