Great Pyramid of Giza

Originally, the great Pyramid was 146.59 m tall but due to the loss of the crowning stone called pyramidion and further erosion it decreased to 138.75 m.

An excerpt from the article 23 facts about Great Pyramid of Giza
It is not excluded that the pyramidion could have been gilded. The view of the complete pyramid in the sunlight must have been breathtaking.