How much gramms of gold was used to build Kremlin?

The Kremlin, particularly its cathedrals and other structures, features gold in its decorative elements, but the exact amount of gold used in its construction is not well-documented. Estimates suggest that various renovations and decorations over the centuries have involved significant amounts of gold, especially in the form of gilded domes and icons. However, a precise figure in grams for the total gold used in the original construction is not readily available.