This is a rammed chalk building with a timbrel vaulted ceiling.
Pines Calyx conference centre in St Margaret's Bay, Kent, UK.
Depending on the weather and the time of day the building
lights, warms or cools itself without producing a scrap of
CO2. Rammed chalk became popular in the 19th century
particularly in the chalk regions of the UK where some of the
chalk deposits are two miles thick.