C.S. SESHADRI, FRS, an eminent Indian mathematician, is director-emeritus of the Chennai Mathematical Institute, India. He is known for his work in algebraic geometry. The well-known "Seshadri constant" is named after him. His work with M.S. Narasimhan on unitary vector bundles and the Narasimhan-Seshadri theorem has influenced the field. His work on geometric invariant theory and on Schubert varieties, in particular his introduction of standard monomial theory, is widely recognized. A recipient of the Padma Bhushan in 2009, the third highest civilian honor in India, he was elected Fellow of the Indian Academy of Sciences in 1971. Professor Seshadri worked in the School of Mathematics at the Tata Institute of Fundamental Research, Mumbai, during 1953-1984, starting as a research scholar and rising to a senior professor. From 1984 to 1989, he worked in Institute of Mathematical Sciences, Chennai, India. From 1989 to 2010, he worked as the founding director of the Chennai Mathematical Institute.