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What is the oldest human-created artifact that has mattered to you? Why/how does it matter?

The most important human created artifact to me would have to be the pyramids. They are probably my favorite because they are giant monument made as burial chambers. I find this interesting but not for just what they are used for but how long it took to make them and how long it will take for them to fall apart.

My favorite pyramids are the Egyptian pyramids, huge structures built of brick or stone, some of which are among the world's largest constructions. The age of the pyramids reached its apex at Giza in 2575-2150 B.C. As of 2008, some 138 pyramids have been discovered in Egypt. The Great Pyramid of Giza is the largest in Egypt and one of the largest in the world. While most people associate pyramids with Egypt there are over 220 pyramids in Sudan.

The pyramids to around 20-50 years to build, this was about two lifetimes back then. That means that 2 or three generations worked on the pyramids. By my estimations the pyramids have corroded about 15% in the about 4500 years they have been built. I think the pyramids will be near completely gone in twenty thousand years. The fact that they last 25,000 years is incredible.

The pyramids can last for a long time and they will be a symbol of history forever.