Geodesic dome Zeiss plant in Jena, Germany. A larger dome, called "The Wonder of Jena", opened to the public in July 1926. Some 20 years later, R. Buckminster Fuller named the dome "geodesic" from field experiments with artist Kenneth Snelson at Black Mountain College in 1948 and 1949. Although Fuller was not the original inventor, he is credited with the U.S. popularization of the idea for which he received U.S. patent 2,682,235 29 June 1954. The geodesic dome appealed to Fuller because it was extremely strong for its weight, its "omnitriangulated" surface provided an inherently stable structure, and because a sphere encloses
S-Bahn Mitteldeutschland in both directions, which ran to Gaschwitz in the south. Later lines were built out to Wurzen in the east and Grünau in the West. On 29 February 1968, the Leipzig Bezirk government decided to build an S-Bahn network. Already at the spring trade fair, the "S-Bahn-style rapid transit" system was demonstrated between the main station and the newly established "Messegelände" (Exhibition Center) stop. By 12 July 1969, the S-Bahn network was expanded to the entire heart shape, in order to cope with traffic volume of the 5th East-German Gymnastics and Sports Festival (). The two branches were named S1