Upscale Square Restaurant Les Sablons Shutters Doors

A little over a year after the flame of Les Sablons’ kitchen brought the historic 1912 Conductor’s Building “to life,” the upscale French restaurant cooled off its stove tops for the last time Thursday.

A message on Les Sablons’ website gave no reason for the restaurant’s closure, instead thanking its staff and patrons.

“We look forward to seeing all your familiar faces at our sister restaurants throughout New England,” the statement reads.

Run by Boston restaurateurs Garrett Harker, Shore Gregory, Skip Bennett, and Jeremy Sewall, the restaurant occupied the only surviving structure from Cambridge’s earliest subway system.

The partners are known for a number of popular New England eateries, including Branch Line, Eastern Standard, Island Creek Oyster Bar and Row 34.

Nicole Kanner, a spokesperson for the restaurant, declined to provide further comment.

During its year of operation, Les Sablons served as the Square’s only French-style restaurant and one of a few high-end options.

Denise A. Jillson, executive director of the Harvard Square Business Association, said at the time of the Les Sablons’ opening that she thought the restaurant could fill a unique niche as a spot for cocktails and small plates after work.

The restaurant also occupied a “unique” building in the thin, narrow brick structure at 2 Bennett St.

The Conductor’s Building had previously served as administrative offices for the Boston Elevated Railway, the earliest version of the Cambridge Subway system.

Developers renovated the building in 2014, paving the way for Les Sablons to move in. The restaurant occupied two stories, with a bar and seating downstairs and the main dining area upstairs.

Gregory wrote at the time that the restaurant had been interested in a Harvard Square location for almost a year.

“We’re honored to have the opportunity to bring the Conductor’s Building to life,” Gregory said at the time. “Its significance was never lost on us.”