The Canadian Tulip Festival, which claims to be the world's largest tulip festival, is a major event held annually each May in Ottawa, Ontario, Canada. During World War II, the Dutch Royal Family took refuge in Canada. Princess Margriet of the Netherlands was born at Ottawa Civic Hospital in 1943, and the Canadian government declared the land to be extraterritorial. This was done to ensure that the princess would have Dutch citizenship. Every year since, Queen Juliana and the royal family after her death have sent tulip bulbs for the festival.