[arethuza]

To give some idea of how long this is supposed to last, 8113 AD is 6102 years in the future. The oldest buildings on the planet are all a good bit less old than 6102 years - they typically start at a maximum of about 3500 BC.

I would suspect that the biggest danger facing such a time capsule is that it is broken into during some time of societal collapse - a sealed strong room is going to look very tempting. For that reason I would suspect that comparable projects in remote locations stand a much better chance of long-term survival:

http://en.wikipedia.org/wiki/Svalbard_Global_Seed_Vault

http://en.wikipedia.org/wiki/Clock_of_the_Long_Now

[ugh]

Are there no buildings older than 6102 years because every building inevitably crumbles or because the buildings that existed 6102 years ago inevitable crumbled?

Agriculture isn’t that old and there just wan’t any need for permanent buildings before agriculture arrived.

It doesn’t seem completely out of the question for the Pyramids to survive another 2,000 years to reach 6,000 years. (Ok, that might be a bad point to make, given that there is nothing inside the pyramids anymore.)

[arethuza]

"Agriculture isn’t that old"

Agriculture is way older than any surviving building, back to about 9000BC:

http://en.wikipedia.org/wiki/History_of_agriculture

[ugh]

Sure, but considering the scales involved the need for buildings is relatively recent.

[arethuza]

Just to clarify - I was talking about oldest surviving buildings as we were discussing time capsules.

There are archaeological sites where large amounts of construction had been carried out that are much older than 3500BC e.g. Çatalhöyük in Turkey:

http://en.wikipedia.org/wiki/%C3%87atalh%C3%B6y%C3%BCk

And, of course, Jericho:

http://en.wikipedia.org/wiki/Jericho