Welcome to the Riemann Center for Geometry and Physics Latest News The RC Welcomes New Senior Riemann Fellow Sebastian Casalaina-Martin Prof. Sebastian Casalaina-Martin is visiting the Riemann Center as a Senior Riemann Fellow. New member of the Riemann Center Professor Heller joined the Riemann Center. Riemann Colloquium Prof. Sturmfels gives a Riemann Colloquium talk. The RC Welcomes New Riemann Fellow Gönül Ünal Dr. Gönül Ünal is visiting the Riemann Center on a Riemann Fellowship. The RC Welcomes New Riemann Fellow Satish Kumar Saravanan Dr. Satish Kumar Saravanan is visiting the Riemann Center on a Riemann Fellowship.