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Naturalis

Naturalis Biodiversity Center is a national museum of natural history and a research center on biodiversity in Leiden, Netherlands.

The current museum is known for the numerous objects in its collections. Prior to the merger with the Zoölogisch Museum Amsterdam and National Herbarium of the Netherlands, there were approximately 10 million zoological and geological specimens in the Naturalis collection.
5,250,000 insects
2,290,000 other invertebrates
1,000,000 vertebrates
1,160,000 fossils
440,000 rocks and minerals
2,000 gemstones
10,000 objects in an educational collection

Following the merger with the collections of the Zoölogisch Museum Amsterdam and National Herbarium of the Netherlands in 2011-12, there are now approximately 37 million specimens.[2]

The collections are stored in a 60-meter-high tower, a landmark in Leiden, opened in April 1998.