It was established in 1830 to allow the training loads of cavalry regiments, including the XXth dragon. The work of the Bühler brothers, famous landscape architects of the nineteenth century, was unfortunately forgotten. The garden was completely rebuilt in its lower part around 1928. Near the large basin, we admire the plant massifs, decorated according to the specific technique of mosaiculture. Deprived today of its bronzes, melted during the war, it owes its cachet to the flower beds and the trees that adorn it.