This fairy tale castle on a hill overlooking the Vltava River is the most popular sight in the city, reflecting the city's "Bohemian Baroque" architecture. The seat of Czech rulers for 1,000 years, today it houses the office of the President. Contained within the castle walls are three courtyards, beautiful gardens, shops, and restaurants. St Vitus Cathedral, a Gothic landmark of the city started in 926 that has always been the center of Prague's religious and political life, is in this giant castle. The cathedral has 21 chapels as well as its most famous archway, the Golden Portal entrance, containing a mosaic of The last Judgement dating back to 1370.