The Tyrant's Tomb

Pompeii a Roman city that was destroyed in 79 CE when the volcano Mount
Vesuvius erupted and buried it under ash
Poseidon the Greek god of the sea; son of the Titans Kronos and Rhea, and
the brother of Zeus and Hades. Roman form: Neptune
praetor an elected Roman magistrate and commander of the army
praetorium the living quarters for the praetors at Camp Jupiter
princeps Latin for first citizen or first in line; the early Roman emperors
adopted this title for themselves, and it came to mean prince of Rome
principia the military headquarters for the praetors at Camp Jupiter
probatio the rank assigned to new members of the legion at Camp Jupiter
Ptolemaic relating to the Greco-Egyptian kings who ruled Egypt from 323
to 30 BCE
Python a monstrous dragon that Gaea appointed to guard the Oracle at
Delphi
River Styx the river that forms the boundary between Earth and the
Underworld
Romulus a demigod son of Mars, twin brother of Remus; first king of
Rome, who founded the city in 753 BCE
Saturnalia an ancient Roman festival held in December in honor of the god
Saturn, the Roman equivalent of Kronos
satyr a Greek forest god, part goat and part man
Selene the moon Titan. Roman form: Luna
Senate a council of ten representatives elected from the legion at Camp
Jupiter
Senate House the building at Camp Jupiter where the senators meet to
discuss such issues as whether a quest should be granted or whether war
should be declared
Sibyl a prophetess
Sibylline Books the Cumaean Sibyl’s prophecies—prescriptions for warding
off disasters—dating back to ancient Roman times, collected in nine
volumes, six of which were destroyed by the Sibyl herself. The three
remaining books were sold to the last Roman king, Tarquin, and then lost
over time. Ella the harpy read a copy of the three Books and is trying to
reconstruct all the prophecies with her photographic memory and the help
of Tyson the Cyclops.