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Le Jardin du Roy Tres Crestien is the most important work by Pierre Vallet and Jean Robin. Robin was the director of the Royal Gardens for many years, and he even had a tree named after him he was considered such an excellent naturalist and botanist. Vallet and Robin combined many times to create works that were celebrated as pre-eminant catalogs of botany and horticulture. However, this work, Le Jardin du Roy Tres Crestien Henry IV is the most celebrated and important work by Valley with Robin's cooperation.