The Grand Duchy of Mecklenburg-Schwerin was a historical state in northern Germany, established in the early 19th century. It was part of the larger region of Mecklenburg, which was known for its agricultural economy and picturesque landscapes. The grand duchy was ruled by the House of Mecklenburg, and its capital was the city of Schwerin, famous for its beautiful castle. The grand duchy existed until the end of World War I in 1918, when monarchies were abolished in Germany. Following this, it became part of the newly formed Free State of Mecklenburg-Schwerin within the Weimar Republic. The region is now part of the modern state of Mecklenburg-Vorpommern.