Bernhard Riemann was a German mathematician born in 1826, known for his groundbreaking contributions to various fields, including analysis, differential geometry, and number theory. He is best remembered for the Riemann Hypothesis, a famous unsolved problem in mathematics that deals with the distribution of prime numbers. His work laid the foundation for many modern mathematical concepts. Riemann's ideas also influenced the development of Einstein's theory of relativity, as his work on curved surfaces helped scientists understand the geometry of space and time. His innovative thinking and theories continue to inspire mathematicians and physicists today, making him a pivotal figure in the history of mathematics.