In the late 1960s, the Indonesian government had requested from the international community a major renovation to protect the monument. In 1973, a master plan to restore Borobudur was created. Through an Agreement concerning the Voluntary Contributions to be Given for the Execution of the Project to Preserve Borobudur (Paris, 29 January 1973), 5 countries agreed to contribute to the restoration: Australia (AUD $200,000), Belgium (BEF fr.250,000), Cyprus (CYP £100,000), France (USD $77,500) and Germany (DEM DM 2,000,000). The Indonesian government and UNESCO then undertook the complete overhaul of the monument in a big restoration project between 1975 and 1982. In 1975, the actual work began. Over one million stones were dismantled and removed during the restoration, and set aside like pieces of a massive jig-saw puzzle to be individually identified, catalogued, cleaned and treated for preservation. Borobudur became a testing ground for new conservation techniques, including new procedures to battle the microorganisms attacking the stone. The foundation was stabilized, and all 1,460 panels were cleaned. The restoration involved the dismantling of the five square platforms and the improvement of drainage by embedding water channels into the monument. Both impermeable and filter layers were added. This colossal project involved around 600 people to restore the monument and cost a total of US$6,901,243.
