In European medieval and renaissance love poetry, the handkerchief is typically a symbol for a woman's romantic favor. For instance, there was a particular ritual in which a lady would drop her handkerchief for a knight to pick up and keep as a token of her regard. The handkerchief that Othello
is, similarly, a love-token and therefore a symbol of their love. But the handkerchief, which originally belonged to an Egyptian sorcerer, also comes to symbolize the illusions that Iago is "casting" through his plotting and subterfuge.