> Roman plasterwork was applied in layers, and in first layer (which is quite rough) a diamond pattern is scratched. I don't think that's correct. I'm pretty s

> Roman plasterwork was applied in layers, and in first layer (which is quite rough) a diamond pattern is scratched. I don't think that's correct. I'm pretty sure the pictures actually depict opus reticulatum, which is a style of brick-lined cement work. https://en.m.wikipedia.org/wiki/Opus_reticulatum https://en.m.wikipedia.org/wiki/Opus_reticulatum I'd be happy to be proven wrong though.