The Tsytsin Main Moscow Botanical Garden of Academy of Sciences was founded in April 1945, and claims itself to be the largest botanical garden in Europe. It covers a territory of approximately 3.61 km², bordering the VDNKH Exhibition Center, and contains a live exhibition of more than twenty thousand different species of plants coming from various parts of the world. The garden also has a scientific research laboratory and contains a rosarium with twenty thousand rose bushes, a dendrarium (arboretum), an oak forest with the average age of the trees exceeding 100 years, and a greenhouse of more than 5000 square meters.[verification needed]