Pyramid

A pyramid is a three-dimensional structure composed of three or four sides composed of (usually) triangular shapes.

The great pyramids of Egypt of Earth are well known to other races. One splinter of Scaroth caused the pyramids to be built. (DW: City of Death) The Osirans also influenced the building of the pyramids, and other pyramids were definitely constructed by 'aliens'. (DW: Pyramids of Mars, BNA: Dead Romance)

The Exxilons influenced not only the Egyptian, but also the Aztec pyramids during their visits to Earth. (NA: The Left-Handed Hummingbird)

Minor References

 * The Great Intelligence used a three-sided pyramid constucted from Yeti control spheres as its physical form, though it truly had no physical form. (DW: The Abominable Snowmen)


 * When showing Adric the chameleon circuit of his TARDIS, the Doctor demonstrated that he could diguise the TARDIS as a pyramid, including a door so they could get in and out. (DW: Logopolis)