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Tiberian denarius

A denarius featuring Tiberius Caesar.

The denarius (plural: denarii) is a type of Roman currency used by Roman demigods at Camp Jupiter and the citizens of New Rome, having also been used in Ancient Rome. Twenty-five silver denarii are worth one aureus. This currency is similar to the Greek currency of drachmas, although the Romans debased their currency to fund their empire.

The Heroes of Olympus

The Son of Neptune

Don the faun stops Hazel Levesque and Percy Jackson on their way to see Octavian at the Temple of Jupiter. He starts talking with them, constantly begging the pair for denarii.

The Mark of Athena

When Frank, Percy, and Coach Hedge arrive at the aquarium, they have three denarii, which they use to pay Keto for VIP treatment, but it turns out to be a trap set by Phorcys and Keto to trap the two demigods and make them part of their exhibit.

Personal Weapons: Riptide | Annabeth's Knife | Backbiter | Frank's Spear | Hazel's Spatha | Katoptris | Nico's Sword | Thalia's Spear | Aegis | Maimer | Kronos' Scythe | Ivlivs | Master Bolt | Poseidon's Trident | Sword of Hades | Reyna's Spear | Hades' Staff | Juno's Gladius | Annabeth's Sword | Sumarbrander | Mjølnir | Thor's Staff | Khopesh | Mallory's Serrated Knife
Magical Items: Annabeth's Yankees Cap | Helm of Darkness | Keys of Hades | Flying Chariot | Golden Apple | Greek Fire | Hermes' Multivitamins | Leo's Magical Toolbelt | Nectar and Ambrosia | Pandora's Pithos | Winged Shoes | The Golden Fleece | Stygian Ice Whistle | Serapis' Staff
Spoils of War: The Minotaur's Horn | Medusa's Head | Kampê's Scimitars | Nemean Lion's Pelt | Gorgon Blood | Cornucopia
Items: Camp Necklace | Chameleon Armor | Daedalus' Laptop | Golden drachma | Denarius | Mark of Athena | The Pax | Video Shield | Wristwatch Shield | Golden Mango | Sibylline Books
Blessed Metals: Celestial Bronze | Imperial Gold | Stygian Iron | Bone Steel