The workshop was organised by ICOMOS Georgia, Riksantikvaren within the Programme, “ Sustainable Rehabilitation of Heritage Site”. The aim of the workshop is to investigate the original earth mortar and choose the compatible mortar composition for the site under the restoration, through in situ testing and modeling. 10 alternative mortar compositions are applied and tested during the workshop. Results will be monitored, recorded and later laboratory tested. Apart from the project team invited craftsmen and young professionals have participated.