What is the oldest thing you own?

As far as human-made things I own, probably some Native American spear points that are 8-10 thousand years old. The oldest book I own is from the 1860s I think

Oldest cool thing that's not just a plain ole rock? 55 million year-old Trilobite fossil

@benjedwards Nah, that is nothing... I got a bit of Stromatolite, picked up on the shore of Lake Superior. 🥳

https://www.lakesuperior.com/the-lake/natural-world/192feature/

Stromatolites: Our Mysterious Ancient Reefs

Discovery of ancient stromatolites on Lake Superior's shore astounded the scientific world and reestablished the age of the oldest known fossils.

Lake Superior Magazine

@benjedwards And then there is this canon ball from the 1672 attack by the Bishop of Münster on the city of #Groningen. 🤩

https://en.wikipedia.org/wiki/Siege_of_Groningen_(1672)

Siege of Groningen (1672) - Wikipedia

@fubaroque Amazing!

@benjedwards These are actually not very rare. People still find them in the mud/clay in the south half of our city. He bombarded us with soooo many of them at the time. The siege lasted from juli 21th until august 28th. And failed, we still celebrate it every year on that day.

This one is solid iron, about 8 cm diameter. But there where also bigger ones and hollow ones that had something flammable in it. Here is a picture of a bigger one... https://cdn.nos.nl/image/2018/06/13/478999/1600x900.jpg

@benjedwards It seems #Bommenberend, as we called him, shot some 9000 iron canon balls and somewhere between 4000 and 5000 mortar- and incendiary bombs at us. And failed to get in... 🥳

No idea how many of these are still around, but they are not really very rare.