What an interesting concept, and very unlike the Romans, to me, from what I had been taught and learned about them regarding war, power, macho and idealized image… to share power!
One system of government of the ancient Roman Empire where power was split among 4 Co-emperors, 1 senior and junior each on the each and west sides of the vast empire
One of several emperors sharing power in the Tetrarchy
A senior co-emperor in the Tetrarchy
A junior co-emperor in the Tetrarchy
The almost triangular space between one side of the outer curve of an arch, and the corner that fills out the side and top to make the arch rectangular in overall shape