Atelier Berthier-Bessac, Stained glass workshop in Grenoble, France

Atelier Berthier-Bessac is a stained glass workshop housed in a four-story building with a corner tower and large roof windows for observing light conditions. The facility contains around 1,500 different glass shades and multiple furnaces for heating and coloring glass.

The workshop was founded in 1860 as a stained glass operation and relocated to Grenoble in 1892, where it remains. During this time, artisans refined their techniques and began creating windows for churches across Europe and beyond.

The workshop's name comes from the Bessac family, who ran it from 1860, and Christophe Berthier, who bought it in 1997. Its ground-floor tower room, restored in 1999, is painted with fleurs-de-lis and a trompe-l'œil starry sky, with corner panels showing architecture, sculpture, painting and engraving.

The workshop is a working stained glass studio, not a site open for tours, so visits are not possible. It stands at 10 rue Émile-Gueymard, opposite the Grenoble station, at the corner of rue de l'Isère, and can be seen from the street. The building is labelled Patrimoine en Isère.

On the ground floor, the workshop has a specialized tower room used by artisans to evaluate glass under different lighting conditions. This space was restored in 1999 and allows them to test color and light effects under realistic circumstances.