The Fontaine de l'Observatoire is a monumental fountain located in the Jardin Marco Polo, south of the Jardin du Luxembourg in the 6th arrondissement of Paris, with sculpture by Jean-Baptiste Carpeaux. It was dedicated in 1874. It is also known as the Fontaine des Quatre-Parties-du-Monde, for the four parts of the world embodied by its female figures, or simply the Fontaine Carpeaux.

The Jardin du Luxembourg, known in English as the Luxembourg Garden, colloquially referred to as the Jardin du Sénat, is located in the 6th arrondissement of Paris, France. The creation of the garden began in 1612 when Marie de' Medici, the widow of King Henry IV, constructed the Luxembourg Palace as her new residence. The garden today is owned by the French Senate, which meets in the Palace. It covers 23 hectares and is known for its lawns, tree-lined promenades, tennis courts, flowerbeds, model sailboats on its octagonal Grand Bassin, as well as picturesque Medici Fountain, built in 1620. The name Luxembourg comes from the Latin Mons Lucotitius, the name of the hill where the garden is located.