Romans in Britain - Roman Building Techniques - "Roman villas were mostly built from local materials. That meant timber and local stone. Tile and brick was made from nearby clay in kilns set up for the job, or the local stone was used for slates. Mosaicists worked on site, or brought in prefabricated panels from their workshops." (source- http://www.romanbritain.freeserve.co.uk)
La pirámide más antigua se construyó 27 siglos antes de Cristo. Humanidad: La Historia de Todos Nosotros.