Helsinki, Finland’s southern capital, sits on a peninsula in the Gulf of Finland. Its central artery, Mannerheimintie, is flanked by institutions including the National Museum, tracing Finnish history from the Stone Age to the present, imposing Parliament House and Kiasma contemporary art museum. On busy Senate Square, the neoclassical Helsinki Cathedral stands in contrast with Uspenski Cathedral and its cupolas. Helsinki has a population of 626,305. The biggest historical museum in Helsinki is the National Museum of Finland, which displays a vast historical collection from prehistoric times to the 21st century. Helsinki has three major theatres, Helsinki is home to two full-size symphony orchestras, the Helsinki Festival is an annual arts and culture festival, which takes place every August. Helsinki has a humid continental climate temperatures in winter are on average in January and February around −5 °C (23 °F). The average maximum temperature from June to August is around 19 to 22 °C (66 to 72 °F).