Observed dome is a dome building at planet Longinus. As the battle of Longinus became more and more of a spectator sport more of the System Lords expressed interest in a facility where they could keep a close eye on the fighting going on without sacrificing the comfort of their private quarters. Such a building would cost a fortune but with none of Goa'uld involved did more than hem and haw about the idea until the Lord Yu got wind of it. He agreed immediately to do the design and construction itself. Less than a year later observed dome was the result. Lord Yu chose to raise the dome of Stargate both convenience Goa'uld travelers and enhanced security. Standing about half a mile from the edge of a cliff, its gleaming bronze facade seen for miles rearing thousands of feet into the sky.