Servius Tullius

Servius Tullius, the sixth king of Rome from 578 to 534 B.C., divided the Roman territory into 30 tribes, and the people into 5 classes, which were further divided into centuries.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Servia * Sesostris
Serbonian Bog
Serfs
Seringapatam
Serjeant-at-Arms
Serpent, The
Serpukoff
Serrano y Dominguez
Sertorius
Servetus, Michael
Servia
Servius Tullius
Sesostris
Sestertius
Settle, Elkanah
Setubal
Seven Champions of Christendom
Seven Deadly Sins
Seven Dolours of the Virgin
Seven Sages of Greece
Seven Sleepers
Seven Wise Masters