Great Cobalt Pyramid

At least in the year 200100, the Great Cobalt Pyramid was a building built on the ruins of the Torchwood Institute. (TV: Bad Wolf)

By 4421, a number of Torchwood's artefacts were hidden beneath the pyramids. Jeremiah Bash Henderson claimed that he and Delilah were planning on getting married there. (AUDIO: The Torchwood Archive)