Australia | 100 Dollars, 1999 | Obverse: Portrait of Dame Nellie Melba (born Helen Porter Mitchell) (1861-1931), was an Australian operatic soprano and became one of the most famous singers of the late Victorian era and the early 20th century. She took the pseudonym "Melba" from Melbourne, her home town | Reverse: Portrait of Sir John Monash (1865-1931), was a civil engineer and an Australian military commander of the First World War | Window: Lyrebird |