How did the make-up of the Roman Senate change over time? A The Roman Senate changed very little over time; senators were elected and consuls were always chosen by the emperor. B By the first century B.C., the Roman Senate changed so much that it was made up entirely by plebian tribunes, but only patricians were allowed as the consuls. C The Roman Senate was originally made up of only patricians, though some plebeians were eventually granted power as tribunes and even rose to the position of consul. D The Roman Senate was at first made up of only plebeians, or lower class people, but as Rome became wealthier, the upper class, or patricians, soon took over the Senate.