ICTP and SISSA are co-organising a Colloquium on Geometry to celebrate the 70th birthday of Mudumbai S. Narasimhan, former head of the ICTP mathematics group and presently a visiting professor at SISSA. The meeting is to take place from 2 to 6 December in the ICTP Main Lecture Hall, where international experts will present a series of lectures on topics related to Narasimhan's contributions in the fields of algebraic and differential geometry. Born in a rural village in southern India, Narasimhan worked for more than 25 years as professor of mathematics at Tata Institute of Fundamental Research in Mumbai. ICTP's founding director, Abdus Salam, recruited Narasimhan to work at the Centre in 1992, where he served as head of the mathematics group until 1998 and subsequently as a consultant. Narasimhan was elected a fellow of the Royal Society, UK, in 1996.