Blatobulgium

Blatobulgium (also, Baltobulgio) was a Roman fort, located at the modern-day Birrens, Dumfriesshire, Scotland.

The name comes from the Brittonic roots *blāto- meaning "flour", and *bolgo- meaning "bag" or "bulge"; so essentially, the name is "flour-sack". There were three granaries at the fort, as demonstrated by the archaeological evidence.