https://en.wikipedia.org/wiki/Old_Town_(Prague)
The Old Town of Prague (Czech: Staré Město pražské, German: Prager Altstadt) is a medieval settlement of Prague, Czech Republic.It was separated from the outside by a semi-circular moat and wall, connected to the Vltava river at both of its ends. The moat is now covered up by the streets (from north to south-west) Revoluční, Na Příkopě, and Národní—which remain the …