Rudolf Simek states that Nordic Bronze Age archaeological finds, such as rock carvings and the Trundholm sun chariot, provide ample evidence of the Sun having been viewed as a life-giving heavenly body to the Bronze Age Scandinavians, and that the Sun likely always received an amount of veneration. Simek states that the only evidence of the Sun assuming a personification stems from the Old High German Incantation reference and from "Poetic Edda" poems, and that both of these references do not provide enough information to assume a Germanic sun cult. "On the other hand", Simek posits, the "great age of the concept is evident" by the Trundholm sun chariot, which specifically supports the notion of the Sun being drawn across the sky by horses. Simek further theorizes that the combination of sun symbols with ships in religious practices, which occur with frequency from the Bronze Age into Middle Ages, seem to derive from religious practices surrounding a fertility god (such as the Vanir gods Njörðr or Freyr), and not to a personified sun.