Yes, Norse mythology predates Christianity. Norse mythology, which is the body of myths of the North Germanic peoples, has its roots in the Proto-Norse period, which dates back to around the 2nd to 8th centuries AD. These myths were passed down orally through generations before being written down in the 13th century in texts like the Poetic Edda and the Prose Edda.
Christianity, on the other hand, began to spread in Scandinavia around the 8th to 12th centuries AD, particularly during the Viking Age. The Christianization of the Norse people was a gradual process, and it wasn’t until the 12th century that Christianity became firmly established in the region.
Therefore, Norse mythology existed and was practiced long before Christianity reached the Norse lands. The myths and stories of Norse gods like Odin, Thor, and Loki were already well-established by the time Christian missionaries arrived.