The TERRA Conference, which occurs every three to five years approximately, is an international conference, whose themes relate to the study and conservation of earthen architectural, archaeological and cultural landscape heritage. The reach of the earthen architecture study was also extended to research, intangible knowledge, earthen contemporary architecture, housing, standards, education and awareness, among others. TERRA conferences occur under the aegis of ICOMOS – International Council on Monuments and Sites, and its expert Committee on earthen architecture: ISCEAH – International Scientific Committee on Earthen Architectural Heritage. TERRA 2012 took place in Lima, Peru.