The castle Bagatelle, built by the Comte d'Artois in 1777, and the surrounding lands were acquired by the City of Paris in 1905. The Commissioner of Gardens for Paris at the time, Jean-Claude Nicholas Forestier, built the Roseraie. It is laid out in strict French style, and today boasts more than 9000 roses and over 1000 varieties. It also contains a wonderful collection of antique and species roses.
In 1907 M. Forestier organized the first international competition for new roses. This prestigious event has been held every June since then, and in 2007 celebrated its 100th anniversary.