The Stadtpark, the first public park in Vienna, opens to the public.

The Stadtpark in Vienna, Austria is a large municipal park that extends from the Ringstraße in the Innere Stadt first district up to the Heumarkt in the Landstraße third district. The park is divided in two sections by the Wienfluss, and has a total surface area of 65,000 square metres. Scattered throughout the park are statues of famous Viennese artists, writers, and composers, including Hans Canon, Emil Jakob Schindler, Johann Strauss II, Franz Schubert, and Anton Bruckner. The opulent Kursalon building on Johannesgasse, with its broad terrace that reaches into the park, is the site of popular waltz concerts.

Vienna is the capital, most populous city, and one of nine states of Austria. It is Austria's primate city, with just over two million inhabitants. Its larger metropolitan area has a population of nearly 2.9 million, representing nearly one-third of the country's population. Vienna is the cultural, economic, and political center of the country, the fifth-largest city by population in the European Union, and the most populous of the cities on the river Danube.

August 21 is the 233rd day of the year in the Gregorian calendar; 132 days remain until the end of the year.