Cardea, sometimes conflated with Carna, guarded entrances and domestic space. In poetic charms or hymns (like Ovid’s Fasti), she wields whitethorn to repel striges (night hags), symbolizing the liminal power of thresholds and the need for spiritual defense in daily life.

Cardea, a nymph granted divine powers by Janus, protected doorways—the most vulnerable point of a Roman home; she wielded hawthorn, a wood believed to repel evil; Ovid links her to the myth of the striges (owl-like child-snatchers) whom she helped defeat; as a liminal deity, she shares functions with Janus and Porta; poets use her in domestic hymns, protective charms, or metaphors for thresholds in life; her cult illustrates the Roman belief that safety begins at the threshold, blending architecture, magic, and divine guardianship.