Ab urbe condita

Then he set himself to by far the greatest of all works in times of peace. Just as Numa had been the author of religious laws and institutions, so posterity extols Servius as the founder of those divisions and classes in the State by which a clear distinction is drawn between the various grades of dignity and fortune.

He instituted the census, a most beneficial institution in what was to be a great empire, in order that by its means the various duties of peace and war might be assigned, not as heretofore, indiscriminately, but in proportion to the amount of property each man possessed. From it he drew up the classes and centuries and the following distribution of them, adapted for either peace or war.

Those[*](The Classes and Centuries.) whose property amounted to, or exceeded 100,000 lbs. weight of copper were formed into eighty centuries, forty of juniors and forty of seniors.[*](The “juniors” betwen the ages of seventeen to forty-six, the “seniors” above that age. But military service was not obligatory on men over sixty.)