Which religious symbol was originally NOT associated with its current faith tradition but was adopted later and became one of the most recognized brand identifiers in history?

Throughout history, religious organizations have utilized symbols, icons, and visual elements that function similarly to modern brand recognition techniques. These powerful symbols transcend language barriers and instantly communicate complex theological concepts to followers. Test your knowledge of how ancient religious symbols became some of the world's most recognizable 'brands' before modern marketing even existed.

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The Christian cross, which became widely used as a symbol only in the 4th century CE, nearly 300 years after Jesus's crucifixion
The Jewish Star of David (Magen David), which has been the primary symbol of Judaism since biblical times
The Islamic crescent moon and star, which was created by Muhammad as the first official symbol of the new faith
The Hindu Om symbol, which was introduced in the 19th century as part of Hindu modernization movements