A Byzantine chain is a metal chain mail design used in jewelry that incorporates a rope-like texture and intriguing textural design. The chains are supple and flexible, and drape well. The origin of the name Byzantine is not known.
The chain is a 4 in 1 chain meaning that each link passes through four others. It is a variation on the Box chain whose links point in a constant direction, unlike Byzantine whose links alternate in direction.
The pattern has also been called ‘Etruscan’, ‘Birdcage’, ‘Fool’s Dilemma’, ‘Idiot’s Trap’, ‘Idiot’s Delight’, and ‘Bird’s Nest’ but Byzantine is the most common name.