Dating back from the Viking period, Uppsala is one of the oldest cities in Sweden. Its historic heritage consist of a collection of monumental buildings. The main sight is the Domkyrka (Uppsala Cathedral), Scandinavia's largest church. Facing the west end of the cathedral is the Gustavianum, built in 1625 to be the main building of the University. Believe it or not, it contains the Museum of Nordic Antiquities, the Victoria Museum and the University's cultural history collections. As a matter of fact, Uppsala University is the oldest institution of higher learning in the country, and among its long roll-call of estimable alumni and professors is Carl Linnaeus. In the 18th century he set the rules for modern taxonomy. Linnaeus lived and worked in Uppsala and his presence is still felt at the Linnaeus Garden and the Botanical Garden.