Constantinople expanded out through the Solar System in the early years.  Yeah, back when we only had one solar system to play around in.  What else were we gonna call it?  They built stations in orbit over Venus, Mars, and every lunar colony any one of our governments built.  They were about the only people we were all willing to trust enough to put something like that over our heads.  They built one heck of a trade network off those stations.  They still have it.