pyramidion:

In ancient Egypt, the pyramidion was the uppermost piece of a pyramid or obelisk. Made of diorite, granite, or fine limestone, the pyramidion was an ornate and highly-decorated capstone that was often covered in gold or electrum. While many pyramids have been destroyed over time, very few pyramidia have survived into modern times, making them a rare and valuable find for … [Read more...] about The Pyramidion: A Stunning Relic of Ancient Egyptian Architecture