I painted Albert Einstein in full color. Here he is giving a lecture in 1921
Albert Einstein Giving a Lecture. 40x30 inches. Oil on Linen.
The formula on the board is what is preserved on a black board Einstein used in Oxford.
Print available here: https://www.inprnt.com/gallery/pavelsokov/albert-einstein-giving-a-lecture-in-1921/
This writing comes from Einstein's Blackboard at the Museum of the History of Science in Oxford