The British Museum is a museum of human history and culture in London. Its collections number more than seven million objects. They are amongst the largest and most comprehensive in the world and originate from all continents. They document and illustrate the story of human culture from its beginning to the present day. The museum first opened to the public on 15th January 1759 in Montagu House in Bloomsbury, on the site of the current museum building. Its expansion over the following two and a half centuries was largely a result of expanding British colonial footprint and has resulted in the creation of several branch institutions, the first being the British Museum (Natural History) in South Kensington in 1887.