On October 8, 1901, Wilhelm II granted Zoppot city rights, spurring further rapid growth. In 1904 a new balneological sanatorium was opened, followed in 1903 by a lighthouse. In 1907, new baths south of the old ones were built in Viking style. In 1909 a new theatre was opened in the nearby forest within the city limits, in the place where today the Sopot Festival is held every year. By 1912, a third complex of baths, sanatoria, hotels, and restaurants was opened, attracting even more tourists. Shortly before World War I the city had 17,400 permanent inhabitants and over 20,000 tourists every year.