Riemann's 200th birthday

I don't think Bernhard Riemann needs an introduction. He's a very important figure in mathematics. He was born on the 17th of September 1826, which is 200 years ago, today! He provide a rigorous (though imperfect) definition of integrals and revolutionized the theory of complex function via the study of Riemann surfaces. He was also the first (?) person to consider spaces of >4 dimensions (some people had studied R^4 already) and the first person to cinsider curved spaces of >2 dimensions. In this he furthered the work of his doctoral advisor Gauss (yes, that Gauss) on curved surfaces (i.e. theorema egregium). Then there's also some other stuff he did, like proving the Riemann mapping theorem, Riemann series theorem, his theorem on removable singularities, and so on ... Oh yeah, and the Riemann hypothesis, of course. He tragically died of TBC at the age of 39. That's right, he did all that before he turned 40 years old!