Editor's note: The story has been updated with additional details on Alan Greenspan’s legacy, with contributions from Benzinga staff.

Former Federal Reserve Chair Alan Greenspan, a key architect of U.S. monetary policy for nearly two decades, died at the age of 100 on Monday.

Greenspan is survived by his wife of 29 years, Andrea Mitchell.

His wife, NBC News correspondent Andrea Mitchell, said in a statement that he died due to complications related to Parkinson’s disease.

Mitchell described him as a towering figure who shaped the U.S. economy across multiple administrations and was candid about his mistakes.