When was gol gumbaz granted world heritage status?

In 1983, the Taj Mahal was declared a World Heritage site. The greatness and uniqueness of this site are the source of the monument's importance, and so the reason it was designated a World Heritage site. The UNESCO organization says the Taj Mahal is "considered to be the greatest architectural achievement in the whole range of Indo-Islamic architecture", not only in appearance but in its construction and conception. Furthermore the Taj Mahal has maintained "integrity", in that it remains as authentic a piece of architecture as it was when first selected to be a World Heritage site.