The Viking Age sword (also Viking sword) or Carolingian sword is the type of sword prevalent in Western and Northern Europe during the Early Middle Ages. The Viking Age or Carolingian-era sword developed in the 8th century from the Merovingian sword more specifically, the Frankish production of swords in the 6th to 7th century and during the 11th to 12th century in turn gave rise to the knightly sword of the Romanesque period. Although popularly called "Viking sword", this type of sword was produced in the Frankish Empire during the Carolingian era. The association of the name "Viking" with these swords is due to the disappearance of grave goods in Christian Francia in the 8th century, due to which the bulk of sword blades of Frankish manufacture of this period were found in pagan burials of Viking Age Scandinavia, imported by trade, ransom payment or looting, while continental European finds are mostly limited to stray finds in riverbeds. Swords of the 8th to 10th centuries are also termed "Carolingian swords", while swords of the late Viking Age and the beginning High Middle Ages (late 10th to early 12th centuries) blend into the category of Norman swords or the early development of the knightly sword. During the Viking age, the Carolingian Empire was central for advanced swordsmithing. The area produced the best quality weapons found in Central and Northern Europe. During the reign of Charlemagne, the price of a sword (a spata) with scabbard was set at seven solidi (totaling about US$1300) (Lex Ribuaria). Swords were still comparatively expensive weapons, although not as exclusive as during the Merovingian period, and in Charlemagne's capitularies, only members of the cavalry, who could afford to own and maintain a warhorse, were required to be equipped with swords. Regino's Chronicle suggests that by the end of the 9th century, the sword was seen as the principal weapon of the cavalry. There are very few references to Carolingian-era sword production, apart from a reference to emundatores vel politores present in the workshops of the Abbey of Saint Gall.