 The Iron Crown of Lombardy ("Corona Ferrea") was used for the coronation of the Lombard kings, and the kings of Italy thereafter, for centuries.The primary sources for the Lombard kings before the Frankish conquest are the anonymous 7th-century "Origo Gentis Langobardorum" and the 8th-century "Historia Langobardorum" of Paul the Deacon.The earliest kings (the pre-Lethings) listed in the "Origo" are almost certainly legendary.