Darmstadt in the context of "Kassel"

Virtual reality (VR) is a simulated experience that employs 3D near-eye displays and pose tracking to give the user an immersive feel of a virtual world. Applications of virtual reality include entertainment (particularly video games), education (such as medical, safety, or military training), research and business (such as virtual meetings). VR is one of the key technologies in the reality-virtuality continuum. As such, it is different from other digital visualization solutions, such as augmented virtuality and augmented reality.

Currently, standard virtual reality systems use either virtual reality headsets or multi-projected environments to generate some realistic images, sounds, and other sensations that simulate a user's physical presence in a virtual environment. A person using virtual reality equipment is able to look around the artificial world, move around in it, and interact with virtual features or items. The effect is commonly created by VR headsets consisting of a head-mounted display with a small screen in front of the eyes but can also be created through specially designed rooms with multiple large screens. Virtual reality typically incorporates auditory and video feedback but may also allow other types of sensory and force feedback through haptic technology.

The Rhine-Main Metropolitan Region, often simply referred to as Frankfurt Rhine-Main, Frankfurt Rhine-Main area or Rhine-Main area (German: Rhein-Main-Gebiet, Frankfurt/Rhein-Main or FrankfurtRheinMain, abbreviated FRM), is the third-largest metropolitan region in Germany after Rhine-Ruhr and Berlin-Brandenburg, with a total population exceeding 5.9 million. The metropolitan region is located in the central-western part of Germany, and stretches over parts of three German states: Hesse, Rhineland-Palatinate, and Bavaria. The largest cities in the region are Frankfurt am Main, Wiesbaden, Mainz, Darmstadt, Offenbach, Worms, Hanau, and Aschaffenburg.

The polycentric region is named after its core city, Frankfurt, and the two rivers Rhine and Main. The Frankfurt Rhine-Main area is officially designated as a European Metropolitan region by the German Federal Ministry of Transport, Building and Urban Affairs and covers an area of roughly 13,000 square kilometers (5,000 sq mi).

The Reichsautobahn system was the beginning of the German autobahns under Nazi Germany. There had been previous plans for controlled-access highways in Germany under the Weimar Republic, and two had been constructed, but work had yet to start on long-distance highways. After previously opposing plans for a highway network, the Nazis embraced them after coming to power and presented the project as Hitler's own idea. They were termed "The Fuehrer's roads" ("German: Straßen des Führers") and presented as a major contribution to the reduction of unemployment. Other reasons for the project included enabling Germans to explore and appreciate their country, and there was a strong aesthetic element to the execution of the project under the Third Reich; military applications, although to a lesser extent than has often been thought; a permanent monument to the Third Reich, often compared to the pyramids; and general promotion of motoring as a modernization that in itself had military applications.

Hitler turned the first sod on 23 September 1933, at Frankfurt, and work officially began simultaneously at multiple sites throughout the Reich the following spring. The first finished stretch, between Frankfurt and Darmstadt, opened on 19 May 1935, and the first 1,000 km (620 mi) were completed on 23 September 1936. After the annexation of Austria, the planned network was expanded to include the Ostmark, and a second soil-breaking ceremony for the first Reichsautobahn on formerly Austrian territory took place near Salzburg on 7 April 1938. When work ceased in 1941 because of World War II, 3,819.7 km (2,373.5 mi) had been completed.

Hesse or Hessen (German: Hessen [ˈhɛsn̩] ), officially the State of Hesse (German: Land Hessen), is a state in Germany. Its capital city is Wiesbaden, and the largest urban area is Frankfurt, which is also the country's principal financial centre. Two other major historic cities are Darmstadt and Kassel. With an area of 21,114.73 square kilometers and a population of over six million, it ranks seventh and fifth, respectively, among the sixteen German states. Frankfurt Rhine-Main, Germany's second-largest metropolitan area (after Rhine-Ruhr), is mainly located in Hesse.

As a cultural region, Hesse also includes the area known as Rhenish Hesse (Rheinhessen) in the neighboring state of Rhineland-Palatinate.

Mainz (German: [maɪnts] ; see below) is the capital and largest city of the German state of Rhineland-Palatinate, and with around 223,000 inhabitants, it is Germany's 35th-largest city. It lies in the Rhine-Main Metropolitan Region—Germany's second-largest metropolitan region after Rhine-Ruhr—which also encompasses the cities of Frankfurt am Main, Wiesbaden, Darmstadt, Offenbach am Main, and Hanau.

Mainz is located at the northern end of the Upper Rhine Plain, on the left bank of the Rhine. It is the largest city of Rhenish Hesse, a region of Rhineland-Palatinate that was historically part of Hesse, and is one of Germany's most important wine regions because of its mild climate. Mainz is connected to Frankfurt am Main by the Rhine-Main S-Bahn rapid transit system. Before 1945, Mainz had six boroughs on the other side of the Rhine (see: de:Rechtsrheinische Stadtteile von Mainz). Three have been incorporated into Wiesbaden (see: de:AKK-Konflikt), and three are now independent.

Wiesbaden (German pronunciation: [ˈviːsˌbaːdn̩] ; lit. 'meadow baths') is the capital of the German state of Hesse, and the second-largest Hessian city after Frankfurt am Main. With around 283,000 inhabitants, it is Germany's 24th-largest city. Wiesbaden forms a conurbation with a population of around 500,000 with the neighbouring city of Mainz. This conurbation is in turn embedded in the Rhine-Main Metropolitan Region—Germany's second-largest metropolitan region after Rhine-Ruhr—which also includes the nearby cities of Frankfurt am Main, Darmstadt, Offenbach am Main, and Hanau, and has a combined population exceeding 5.8 million.

The city is located on the Rhine (Upper Rhine), at the foothills of the Taunus, opposite the Rhineland-Palatine capital of Mainz, and the city centre is located in the wide valley of the small Salzbach stream. Wiesbaden lies in the Rheingau wine-growing region, one of Germany's 13 wine regions. Three of Wiesbaden's boroughs were part of the city of Mainz until 1945, and still bear the designation "Mainz" in their names—the so-called AKK-boroughs of Mainz-Amöneburg, Mainz-Kastel, and Mainz-Kostheim. This so-called AKK-Konflikt (de:AKK-Konflikt) is the main cause for the rivalry between Mainz and Wiesbaden. Wiesbaden Main Station is connected to Frankfurt am Main by the Rhine-Main S-Bahn rapid transit system.

Jugendstil (German pronunciation: [ˈjuːɡn̩tˌstiːl] ; "Youth Style") was an artistic movement, particularly in the decorative arts, that was influential primarily in Germany, Austria, and elsewhere in Europe to a lesser extent from about 1895 until about 1910. It was the German and Austrian counterpart of Art Nouveau. The members of the movement were reacting against the historicism and neo-classicism of the official art and architecture academies. It took its name from the art journal Jugend, founded by the German artist Georg Hirth. It was especially active in the graphic arts and interior decoration.

Its major centers of activity were Munich, Vienna and Weimar and the Darmstadt Artists' Colony founded in Darmstadt in 1901. Important figures of the movement included the Swiss graphic artist Hermann Obrist, Otto Eckmann, the Belgian architect and decorator Henry van de Velde, as well as the Austrians Otto Wagner, Joseph Maria Olbrich, Gustav Klimt, and Koloman Moser, among others. In its earlier years, the style was influenced by the British Modern Style. It was also influenced by Japanese prints. Later, under the Secessionists' influence, it tended toward abstraction and more geometrical forms.

The People's State of Hesse (German: Volksstaat Hessen) was one of the constituent states of Germany from 1918 to 1945, as the successor to the Grand Duchy of Hesse (German: Großherzogtum Hessen) after the defeat of the German Empire in World War I, on the territory of the current German states of Hesse and the Rhineland-Palatinate. The State was established after Grand Duke Ernest Louis was deposed on 9 November 1918. The term "People's State" referred to the fact that the new state was a Republic (rather than implying that it was a socialist state) and was used in the same manner as the term Free State, which was employed by most of the other German States in this period.

Like the Grand Duchy, the capital was Darmstadt and the state consisted of provinces Upper Hesse (German: Oberhessen, capital Gießen), Starkenburg (capital Darmstadt) and Rhenish Hesse (German: Rheinhessen, capital Mainz). The area of the state was 7,692 km²; it had 1,347,279 inhabitants in 1925. Around two-thirds professed Protestantism, the other third were Roman Catholics.