This article examines a sword discovered on the seabed near Newe-Yam, providing an analysis of its physical characteristics. The location of the discovery and the submarine iron corrosion processes are described. The sword, covered in a biogenic crust, was studied using non- and minimally invasive techniques, and compared with contemporary swords. A European origin and an approximate date in the twelfth–thirteenth centuries CE are proposed. The study also discusses the role of swords in Medieval European society, their association with authority and chivalry, and the romantic perceptions concerning Crusader swords.