The Paris expo Porte de Versailles is an exhibition centre in Paris, France. It is located in the 15th arrondissement at Porte de Versailles Métro station between the Boulevard Périphérique and Boulevards of the Marshals. It is the largest exhibition park in France. The Tour Triangle, a 180 metres tall glass pyramid, is planned to be constructed near the site.

Paris’ former Chemin de fer de Petite Ceinture (‘small(er) belt railway’), also colloquially known as La Petite Ceinture, was a circular railway built as a means to supply the city’s fortification walls, and as a connection between Paris‘ railway termini. Built as two distinct ‘Ceinture Syndicate’ freight and ‘Paris-Auteuil’ passenger lines from 1851 that together formed an arc that surrounded the northern two thirds of Paris, it would become a full circle of rail around the capital when its third Ceinture Rive Gauche section was built in 1867. Serving first as a freight-only line, then developing into a passenger service, the Chemin de fer de Ceinture became Paris’ first metro-like urban transport. Much-frequented until its 1900 Universal Exposition peak, the Metro appearing that year would mark the onset of the Petite Ceinture line’s decline.

Mostly abandoned since its last year of passenger service in 1934, but still largely intact, its future is still the source of much debate as of 2017. Many would like to preserve the remaining stations as part of France’s national heritage, while others would like to see its former path transformed into parks and communal gardens and yet others would like to see, in some form, the track and stations remaining become a functioning line once again.