Two problems have to be solved by all building construction
how to keep the walls up
how to span the spaces between them
See how the use of solid walls such as brick and stone has produced chunky low-rise buildings.
Learn how frame structures have been used to create tall buildings, clad with a range of materials from wattle and daub to glass.
Discover how architects and builders have developed arches, vaults and domes to span wide roof spaces.