What Is This Cauldron?

It appears to have been deposited in the bog deliberately, especially because it was disassembled when it was put into the bog. So this cauldron has many detachable features. There is no text anywhere on it, so it's not like a political cartoon where everything's labelled and you know what it means. But the imagery, as you already said, robis is fascinating. It would be like finding what a bulgarian band that only does covers of tic music i modern denmark, and wondering like how they came to be there? Ah, yes, the thrash metal polka bands of canada.