Paradox Development Studio, the internal developer at Paradox Interactive responsible for many of the company's grand strategy hits, has "split into three distinct studios." The change happened earlier this year and was announced yesterday in a post on the Paradox forum.
Each of the three studios is committed to a particular Paradox series, but notably Imperator: Rome isn't among them. Also notable: one of them is making a new game which will be announced next month.