In ancient Rome, the governing and advisory council that was the most permanent element in the Roman constitution.
Under the monarchy it served as an advisory council, with undefined powers. During the republic it advised the consul s and supposedly stood second to them in power. Senators were appointed by the consuls, but since they served for life, by the late republic the Senate became independent of the consuls, with extensive powers. About 312 BC the selection of senators was transferred from the consuls to the censor s. In 81 BC quaestor s. It became the chief governing body and controlled the republic's finances. Julius Caesar increased the number of senators to 900. Augustus dropped the number to 300 and reduced the Senate's power, while giving it new judicial and legislative functions. The number later increased to about 2,000; many were provincials, the most important being the great landowners. The Senate's power faded until it disappeared from the historical record in the 6th century AD.