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Origin and history

The Porte Saint-Laurent, located at the eastern entrance of Grenoble, was built in 1615 by order of François de Bonne de Lesdiguières, governor of Dauphiné, as part of the fortifications linking the Bastille to the Isère. It replaces a first door built in 1395 under the Dauphins, then rebuilt several times (1406, 1595). Its role was both defensive and symbolic, marked by architectural elements such as a mâchicoulis and braces, as well as a Latin inscription that disappeared from the Revolution.

The gate was renovated at the beginning of the 18th century, particularly on the interior, and retained a special status until 1864: unlike the other gates of Grenoble, it opened at 5am. His house and bridge were listed as historic monuments in 1931. Today, it dominates Place Saint-Laurent, an urban area linking the Xavier-Jouvin wharf and sheltering remains of the old casemates, including an archaeological museum.

Architecturally, the Porte Saint-Laurent illustrates the 17th century defensive art, with its 19th century wood vants and protective devices (mâchicoulis, braces). Close to the fort of the Bastille, it testifies to the urban expansion of Grenoble under Lesdiguières, while serving as a boundary between the city and the slopes of Mount Rachais. Its current environment combines military heritage (casemates transformed into CCSTI) and urban life, served by the tramway.

The original Latin inscription, erased during the Revolution, celebrated the reigns of Henry IV and Louis XIII, as well as the role of Lesdiguières in the enlargement of Grenoble. This text highlighted the dual function of the door: defence and prestige. Today, although closed to the inside visit, it remains a major historical landmark of the Saint-Laurent district, between Isère and Massif de la Chartreuse.

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