According to the writer Charlotte Anne Eaton, these rooms were dens that were part of a vivarium in which wild animals were kept before being used in entertainments held at the Colosseum. A low vaulted passage connected this vivarium with the Colosseum.
Charlotte Anne Eaton states that these rooms served as enclosures within a vivarium where wild animals were kept prior to being featured in events held at the Colosseum. A passageway leading to the Colosseum was also part of this setup.