Complex sentence: The first Emperor, Augustus, reduced the size of the Senate from 900 members to 600 members, even though there were about 100 to 200 active senators at one time, after this point, the size of the Senate was never again drastically altered.
Split into simpler sentences: The first Emperor, Augustus, reduced the size of the Senate from 900 members to 600 members, even though there were about 100 to 200 active senators at one time. After this point, the size of the Senate was never again drastically altered.