Romulus was credited with several religious institutions. He founded the Consualia festival, inviting the neighbouring Sabines to participate; the ensuing rape of the Sabine women by Romulus's men further embedded both violence and cultural assimilation in Rome's myth of origins. As a successful general, Romulus is also supposed to have founded Rome's first temple to Jupiter Feretrius and offered the spolia opima, the prime <answer>spoils taken in war</answer>, in the celebration of the first Roman triumph. Spared a mortal's death, Romulus was mysteriously spirited away and deified.
What did Romulus offer to Jupiter in the first Roman Triumph?
spoils taken in war