Just to supplement Wlodek's description with an image, here is Buckminster Fuller's 1954 patent drawing: <br />![Fuller Dome Patent][1] <br /> <sub>Image from Wikipedia link on [B. Fuller page][2].</sub> <hr /> My apologies to Wlodek, not noticing that Fuller's dome does not match his description. Here is a second attempt... <br />![Geo Dome 5 levels][3] [1]: https://i.sstatic.net/Uv4yT.jpg [2]: http://en.wikipedia.org/wiki/R._Buckminster_Fuller [3]: https://i.sstatic.net/yk1r3.jpg