What could this be?

[the6dead]

U

And all we have to do is wait for minimalist to come in, take one look at it, and tell us all seven hundred and fifty reasons it is not evidence of 'Christ's last days.

But I enjoy a good war, so when do we get started?

Lead was a favourite metal of the Roman Empire...(also "lead" to the mental health issues surrounding the use of the heavy metal)

If I can remember correctly, lead was one of the top most used metals that the Romans had. They obviously knew nothing about it's effects on the human brain. Lead was even found in their water supply, they believe this caused numerous mental health problems...(lead poisoning). Maybe that's what caused the fall of the empire, everyone went stupid.
Also it would explain how Christianity got in. When people go dumb, they go to religion.

Back then it was a common belief that the heart was the centre of thought and not the brain, the Romans had slaves and criminals tied down to a hard table and cut their chests wide open while they were still alive. This was so they could see the human organs functioning and learn more about them. They discovered that actually it was the brain and not the heart that was the centre of thought. Of course the Christians back then held the belief that the heart was centre of thought and when that belief was contradicted, they went and burnt down a Roman library containing the newly gained knowledge. 200 years of knowledge was destroyed, typical religious behaviour. Of course they eventually had no choice but to alter their beliefs and accept the facts. They'd never admit to it though.
Religious beliefs proved wrong demonstrates that if one of your religious beliefs are wrong, they could all be wrong.

Romans was also consuming lead. Lead was added to food for flavor.