Botanic garden, founded in 1638 (which Linkedin does not accept as possible founding year, probably we're too old for the digital age..). The Hortus houses more than 4,000 different species of plants, which is about 2% of all plant species growing on Earth. The Hortus closely cooperates with other botanic gardens, both nationally as internationally. Networks: IPEN, BGCI, NVBT (The Nederlandse Vereniging van Botanische Tuinen; Dutch Association of Botanical Gardens), SNP a.o.