What countries remained the same after congress of Vienna?

- Baden

- Bavaria

- Denmark

- Great Britain

- Hanover

- Hesse-Cassel

- Hesse-Darmstadt

- Liechtenstein

- Mecklenburg-Schwerin

- Mecklenburg-Strelitz

- Netherlands

- Oldenburg

- Ottoman Empire

- Portugal

- Prussia

- Russia

- Sardinia

- Saxony

- Spain

- Sweden

- Switzerland

- Württemberg