Prague Castle has served as the seat of Czech princes and kings since the past centuries and as the seat of the President since 1918. The most impressive building at the Castle is St. Vitus Cathedral, a Gothic cathedral founded by Charles IV in the 14th century and completed in 1929. Charles Bridge is the oldest and most charming of Prague's many bridges, decorated with 30 statues and spanning 520 meters across the Vltava River between the Old Town and Malá Strana districts.