A sun cross, solar cross, or wheel cross is a solar symbol consisting of an equilateral cross inside a circle. The design is frequently found in the symbolism of prehistoric cultures, particularly during the Neolithic to Bronze Age periods of European prehistory. The symbol's ubiquity and apparent importance in prehistoric religion have given rise to its interpretation as a solar symbol, whence the modern English term "sun cross" (a calque of German: Sonnenkreuz). The symbol means village in Ancient Egyptian (Gardiner symbol O49).
Prehistoric rock carvings at Madsebakke, on Bornholm Island, Denmark, depict multiple sun crosses with cup marks. These petroglyphs date to the Bronze Age (c. 1800–500 BCE) and are among the best-preserved in Scandinavia. The big wheel sun cross, carved directly into granite bedrock, is a circular motif with radial arms – often interpreted as a solar symbol representing the movement of the sun or the cycle of seasons. Around it are cup marks, small carved indentations believed to hold ritual significance, possibly linked to offerings or celestial events. Other locations with similar sun cross motifs and cup-marked stones include: