The Romans called Wiesbaden’s twin town Emona. It was once destroyed by the Huns, than rebuilt by the Slavs during the sixth century. The name "Laibach" is first recorded in written history around 1100.
In 1335, the area fell under Habsburg rule, which remained in power until 1918, with the exception of the days of the Illyrian Provinces under Napoleon. When the railroad from Vienna to Triest was built around the middle of the 19th century, the city’s influence and significance grew.
Near the end of the 19th century, an earthquake destroyed a large number of houses, making room for many Art Nouveau buildings designed by famous architects like Josef Plečnik or Max Fabiani.
After World War II, Ljubljana became the Slovenian capital of the Kingdom of Yugoslavia. Slovenia emerged as a Republic in Federal Yugoslavia after World War II. In 1991, Slovenia declared its independence and Ljubljana became the capital of the new state, which joined the European Union in 2004 and adopted the Euro as its currency in 2007.