My college and med school diplomas are both in the original cardboard tubes that they came in, at the back of my closet. I'm afraid that if I ever took them out they'd crumble.

About 20 years ago I had to send my original med school diploma to a state where I was applying for a license. I discovered that the diploma had been lost in one of my moves. The school replaced it, for a fee. But, since it had been about 10 years since I graduated, the school administrators had changed. So the new diploma has completely different signatures that the "original original". It also has a big red stamp on the bottom saying "this original replaces the original that was lost". It's not pretty, but it works.