The organization was registered to the UNESCO World Heritage site in 1983, this ancient city with palaces, temples and churches, many of which the Observatory has been maintained in good condition.
The Organization has been registered by UNESCO as a world heritage site in 1983, within the old city includes the Palace Cathedral and Church of Observatory, which has been maintained in good condition.
The organization has registered as a Unesco World Heritage site in the year 1983 in the city and this ancient temple observatory Palace and the church of which many are kept in good condition.