It's a common misconception, but **Albert Einstein did not win the Nobel Prize for his theory of relativity**. He was awarded the **Nobel Prize in Physics in 1921** for his explanation of the **photoelectric effect**.

The official citation was:  
> "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect."

While Einstein is famously known for his theories of relativity (special and general), the **photoelectric effect**—his work that showed light can behave as quanta of energy (later called photons)—was considered more experimentally verifiable at the time and had a profound impact on the development of quantum physics. 

**In summary:**  
- **No, Einstein did not win the Nobel Prize for relativity.**
- **He won it for his work on the photoelectric effect.**
