Tsung-Dao Lee (李政道), Member (1951–53, 1957–58) and Faculty (1960–62) in the School of Mathematics/Natural Sciences, passed away on August 4 at his home in San Francisco. IAS remembers Lee whose revolutionary work on parity violation in weak interactions saw him awarded the Nobel Prize in 1957, and whose work at the Institute and beyond continues to influence and inspire scientists for generations to come.