The first line of the Paris Metro opens for operation

On July 19, 1900, the Paris Métro made its historic debut, marking a transformative moment in urban transportation. The first line, known as Line 1, stretched between Porte de Vincennes in the east and Porte Maillot in the west, spanning approximately 10.3 kilometers (6.4 miles). This new transit system was designed to meet the growing transportation demands of a rapidly expanding Paris, which had seen its population swell during the late 19th century. The opening coincided with the Paris Exposition Universelle of 1900, a world's fair that brought millions of visitors to the city and underscored Paris's status as a global cultural and technological hub. The Métro was the brainchild of engineer Fulgence Bienvenüe, often referred to as the 'Father of the Paris Métro,' and architect Hector Guimard, whose iconic Art Nouveau station entrances became symbols of the city. Construction of Line 1 began in 1898 and involved innovative techniques for the time, such as cut-and-cover tunneling. The line was operated by the Compagnie du chemin de fer métropolitain de Paris (CMP), which was granted a concession by the city government. The electric trains, powered by a third rail system, were a cutting-edge choice, replacing steam engines and offering a cleaner, quieter alternative. The new system was met with enthusiasm and skepticism alike, but its impact was immediate. On its first day, the Métro carried over 30,000 passengers, proving its utility and popularity. The Paris Métro set a template for modern subway systems around the world with its focus on connectivity, accessibility, and integration into the urban fabric. Today, the Paris Métro is one of the busiest and most iconic subway systems globally, with Line 1 still serving as a vital artery, albeit extensively modernized since its inception.