The skeletal remains of a man buried 1,400 years ago near a headless horse have been discovered at an ancient cemetery in the town of Knittlingen in southern Germany. He likely was the horse's owner/rider when he was alive. The man was buried at a time when the Merovingian dynasty (A.D. 476–750) flourished in the area, ruling a giant swath of territory in what is now France and Central Europe. During his lifetime, the man likely served the dynasty's kings. "He stood in a 'chain of command' with the Merovingian kings on its top, which meant he was obliged to...