Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Stoneware produced in early Gaul
Terra nigra refers to black or silver-grey stoneware such as plates or cups produced between the first century BC and the first century AD in northern Gaul, distributed across northeast Gaul and southeast Britain, now most often found in Britain.
References
"terra nigra". Oxford Reference. Retrieved 2024-06-16.