Germanic or Slavic Cavalryman on a Gravestone
Magdeburg region, Germany, c.700AD

This gravestone of around 700 AD from the Magdeburg region shows the simple weaponry, sword, spear and shield, common to both Germans and Slavs in this frontier region. (Landesmuseum für Vorgeschichte, Halle)
Source: p.3, The Age of Charlemagne (Men-at-Arms 150) by D.Nicolle, A.McBride

Merovingian Cavalry 7th-8th Century in Armies of the Dark Ages 600-1066 by Ian Heath, perhaps based on this funerary stele.
See also The Franks Casket / The Auzon Casket, Anglo-Saxon, early 8th century, British Museum
Fresco of the Crucifixion from Santa Maria Antiqua, 741–52AD, Rome, Italy
7th Century Illustrations of Costume and Soldiers