The Hanover Royal Music Archive consists of printed and manuscript music, printed books about music, and related materials assembled by Ernest Augustus, King of Hanover, and his successors. A significant component originated in England and concerns musical activity of several children of George III, circa 1770-1837, particularly Ernest Augustus, then Duke of Cumberland, and Princess Augusta, as well as Prince George of Cumberland, son of Ernest Augustus and later Georg V, King of Hanover. These materials moved to Hanover, apparently circa 1837 when Ernest Augustus succeeded William IV as King of Hanover. In Hanover, the collection was expanded by Ernest Augustus and Georg V, and much of the present content relates to music in the Hanoverian court through the mid-nineteenth century. While most materials date circa 1770-1870, a few items extend this span from the seventeenth through the mid-twentieth century.