Source The Rotunde, Vienna 1873. Destroyed in 1937 by fire. It was the largest cupola construction in the world, larger than the Pantheon in Rome (diameter 43,4 m); built in 118–125
redofhair says ​ >The **Rotunde** (German: [[roˈtʊndə]](https://en.wikipedia.org/wiki/Help:IPA/Standard_German)) in [Vienna](https://en.wikipedia.org/wiki/Vienna) was a building erected for the [Weltausstellung 1873 Wien](https://en.wikipedia.org/wiki/Weltausstellung_1873_Wien) (the Vienna [World Fair](https://en.wikipedia.org/wiki/World_Fair) of 1873). The building was a partially covered circular [steel](https://en.wikipedia.org/wiki/Steel) construction, 84 m (approx. 275 ft) in height and 108 m (approx. 354 ft) in diameter. For almost one century (followed after its own destruction by an exhibition hall in Belgrade, 1957) it was the largest cupola construction in the world, larger than the [Pantheon in Rome](https://en.wikipedia.org/wiki/Pantheon,_Rome)(diameter 43,4 m); built in 118–125. It was designed by Austrian architect [Karl Freiherr von Hasenauer](https://en.wikipedia.org/wiki/Karl_Freiherr_von_Hasenauer) and built by the German company Johann Caspar Harkort of [Duisburg](https://en.wikipedia.org/wiki/Duisburg). The Scottish engineer for the roof was [John Scott Russell](https://en.wikipedia.org/wiki/John_Scott_Russell) who used 4,000 tons of steel with no ties.[[1]](https://en.wikipedia.org/wiki/Rotunde#cite_note-1) > >The central building of the World Fair was accepted enthusiastically by the public. It was used for shows and fairs later on. [Alexander Girardi](https://en.wikipedia.org/wiki/Alexander_Girardi) performed a concert in this hall. In 1898 a “Collektivausstellung österreichischer Automobilbauer” (Collective Exhibition of Austrian Carbuilders) was shown during the “Kaiser [Franz Joseph](https://en.wikipedia.org/wiki/Franz_Joseph_I_of_Austria) Jubiläumsausstellung” (Emperor Franz Joseph Jubilee-Exhibition). The first four cars ever built in [Austria-Hungary](https://en.wikipedia.org/wiki/Austria-Hungary) were shown there, amongst them the car built by [Siegfried Marcus](https://en.wikipedia.org/wiki/Siegfried_Marcus) in 1888/89. > >The Rotunde burned down in 1937. Its former location is now occupied by a portal of the [Vienna International Fair](https://en.wikipedia.org/w/index.php?title=Vienna_International_Fair&action=edit&redlink=1). -[Wiki](https://en.wikipedia.org/wiki/Rotunde)
JaNatuerlich says The years during which the Pantheon was constructed are very relevant to this photo of a completely different building and not confusing at all.
redofhair says
​
>The **Rotunde** (German: [[roˈtʊndə]](https://en.wikipedia.org/wiki/Help:IPA/Standard_German)) in [Vienna](https://en.wikipedia.org/wiki/Vienna) was a building erected for the [Weltausstellung 1873 Wien](https://en.wikipedia.org/wiki/Weltausstellung_1873_Wien) (the Vienna [World Fair](https://en.wikipedia.org/wiki/World_Fair) of 1873). The building was a partially covered circular [steel](https://en.wikipedia.org/wiki/Steel) construction, 84 m (approx. 275 ft) in height and 108 m (approx. 354 ft) in diameter. For almost one century (followed after its own destruction by an exhibition hall in Belgrade, 1957) it was the largest cupola construction in the world, larger than the [Pantheon in Rome](https://en.wikipedia.org/wiki/Pantheon,_Rome)(diameter 43,4 m); built in 118–125. It was designed by Austrian architect [Karl Freiherr von Hasenauer](https://en.wikipedia.org/wiki/Karl_Freiherr_von_Hasenauer) and built by the German company Johann Caspar Harkort of [Duisburg](https://en.wikipedia.org/wiki/Duisburg). The Scottish engineer for the roof was [John Scott Russell](https://en.wikipedia.org/wiki/John_Scott_Russell) who used 4,000 tons of steel with no ties.[[1]](https://en.wikipedia.org/wiki/Rotunde#cite_note-1)
>
>The central building of the World Fair was accepted enthusiastically by the public. It was used for shows and fairs later on. [Alexander Girardi](https://en.wikipedia.org/wiki/Alexander_Girardi) performed a concert in this hall. In 1898 a “Collektivausstellung österreichischer Automobilbauer” (Collective Exhibition of Austrian Carbuilders) was shown during the “Kaiser [Franz Joseph](https://en.wikipedia.org/wiki/Franz_Joseph_I_of_Austria) Jubiläumsausstellung” (Emperor Franz Joseph Jubilee-Exhibition). The first four cars ever built in [Austria-Hungary](https://en.wikipedia.org/wiki/Austria-Hungary) were shown there, amongst them the car built by [Siegfried Marcus](https://en.wikipedia.org/wiki/Siegfried_Marcus) in 1888/89.
>
>The Rotunde burned down in 1937. Its former location is now occupied by a portal of the [Vienna International Fair](https://en.wikipedia.org/w/index.php?title=Vienna_International_Fair&action=edit&redlink=1).
-[Wiki](https://en.wikipedia.org/wiki/Rotunde)
AvielanderBright says
Very interesting!
JaNatuerlich says
The years during which the Pantheon was constructed are very relevant to this photo of a completely different building and not confusing at all.