Opening of the Paris-Saint-Germain railway

The Paris to Saint-Germain-en-Laye line opened on June 16, 1839, becoming France's first railway dedicated to passenger service. Engineered by Émile Péreire and his brother Isaac, it featured a 19 km route with innovative steam locomotives built by British firm Sharp, Roberts & Co. The line overcame significant engineering challenges including a steep incline at Le Pecq using a stationary engine and cable system. This development spurred rapid expansion of the French rail network, connected Paris to its western suburbs, and symbolized the Industrial Revolution's impact on transportation. It carried thousands of passengers in its first year and influenced later Parisian suburban rail designs.