The Citroën XM Tissier Altesse represented one of the most exclusive and ambitious limousine projects ever undertaken by Pierre Tissier. Designed to showcase both prestige and practicality, it combined the XM’s cutting-edge technology with hand-crafted luxury worthy of a bespoke executive car. The Altesse distinguished itself through its elegant proportions, elongated bodywork, and seamless integration of Tissier’s custom engineering, which preserved the XM’s renowned hydropneumatic suspension for exceptional comfort. Each example was individually tailored, with unique interior layouts and finishes depending on client specifications—ranging from discreet executive transport to opulent, chauffeur-driven configurations. Today, the Altesse stands as one of the rarest expressions of Citroën’s design philosophy, a remarkable symbol of 1990s French automotive artistry and Tissier’s talent for turning innovation into exclusivity.