Tour Cristal, Office skyscraper in the Front de Seine, 15th arrondissement, Paris, France

Tour Cristal is a 29-storey office tower completed in 1990 at 7-11 quai André Citroën in the Front de Seine district. Its blue reflective glass curtain wall is folded into angled planes, with a wide dark vertical band down the centre and two projecting wedge-shaped sections near the lower left. The faceted top rises behind a row of trees.

The building was completed in 1990 following substantial changes to its original design from the early 1970s. The project evolved significantly during planning before its final glass structure was constructed.

Tour Cristal takes its name from the faceted, cut-glass look of its original facade, whose angled panes the architects modelled on light studies by the painter Salvador Dalí. Completed in 1990, it was the last tower raised on the Front de Seine, and its blue reflective glazing made it, with the Tour Totem, one of the district's most recognisable silhouettes.

The structure underwent major upgrades from 2007 to 2010, adding geothermal heating and cooling systems throughout. Visitors can best view the exterior from the riverbank or nearby streets around Front de Seine.

The tower sits near Pont de Grenelle with distinctly angled glass surfaces that set it apart from neighboring Front de Seine buildings. The faceted glass panels create different visual effects depending on the viewing angle and time of day.