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The Rotunde under construction in October 1872The opening of the 1873 Vienna World's Fair inside the Rotunde
The German engineer and journalist Wilhelm Heinrich Uhland reported, that the Rotunde weighed approximately "80,000 hundredweight (Zoll centner), or about 4000 tons", that is, 4,000,000 kg (8,800,000 lb).[1][c]
Conversions of the Rotunde's weight
A centner is a unit of mass equal to 100 of some base unit of mass. The German equivalent of the centner is the Zentner, and its base unit was traditionally the pound (German: Pfund), the definition of which varied in Germany. In 1854 the Zollpfund was defined by the German Customs Union (German: Zollverein) as being equal to 500 grams. The "Zoll[ ]zentner"[3] or "Zoll[ ]centner"[4] is a Zentner/centner with the Zollpfund as its base unit: the Zollzentner is equal to 100 Zollpfund.
Accordingly, the weight of the Rotunde reported by Uhland can be converted into metric units:
The central building of the World's Fair was accepted enthusiastically by the public. After the World's Fair, the Rotunde was used for shows and fairs.
Fiakerlied
Sheet music cover art of Girardi's 1885 performance in the Rotunde
In 1898, Emperor Franz Joseph's Jubilee Exhibition (Jubiläumsausstellung) was held in the Rotunde. The "Collective Exhibition of Austrian Automobile Builders" (German: Collektivausstellung österreichischer Automobilbauer), organized by the Austrian Automobile Club [de] (German: Österreichische Automobil-Club), was held as part of the Jubilee Exhibition. Four automobiles from manufacturers in Austria-Hungary were shown: the automobile built by Siegfried Marcus in 1888–1889 (the first automobile built in Austria-Hungary), an Egger-Lohner electric automobile, an Egger-Lohner petrol automobile, and the Nesselsdorfer Wagenbau-Fabriks-Gesellschaft (now Tatra) Präsident.
Notes
^"Accurately stated, the exterior diameter of the Rotunde is 107·83 meters, and its height 84·1 meters"[1]
^The Pantheon in Rome, which was dedicated c. 126 AD, over 1,700 years before the Rotunde was completed, has a dome that is 43.3 m (142 ft) in diameter
^"The total weight of the structure of the Rotunde may be stated in round numbers at 80,000 hundredweight (Zoll centner), or about 4000 tons"[1]
References
^ abcdUhland, Wilhelm H. Heinrich (1873) [1872-11]. "Notes on the Vienna Universal exposition". Journal of the Franklin Institute. 95 (3). Published by the Franklin Institute at their Hall: 185. doi:10.1016/0016-0032(73)90149-x. ISSN0016-0032. OCLC1044760573.
^Meyers Großes Konversations-Lexikon (in German). Vol. 20. Bibliographisches Institut. 1909. p. 982.
^von Hermann, Friedrich Benedikt Wilhelm (1862). Eleven Volumes. : —(2.)— : East India Communication; Sydney Branch Mint; Weights and Measures. Reports from Committees. Vol. 7. pp. RA2 –PA228.
^"The Prater—Two Centuries of a Vienna Institution". Austrian Information. Vol. XIX. Austrian Information Service. 1966. pp. RA5 –PA5. ISSN0005-0520.
^Zapke, Susana; Fichna, Wolfgang (2023). Die Musik des Wiener Praters. Eine liederliche Träumerei: Unbekannte Lieder aus zwei Jahrhunderten (in German). Hollitzer Wissenschaftsverlag. p. PA106. ISBN9783990940891. OCLC1396220012.
