This thesis investigates how 19th century developments affected the traditional meaning of ornament and eventually led to its demise. It focuses on the qualities of ornament from the mid-19th century, as exhibited in the Great Exhibition 1851, and how the taste of these objects were debated, and ambiguously redefined. The optimism, prosperity and technological advances of the age played a key role in the middle class impulse for increasingly elaborate ornamentation. However, their new economic influence over the work of the artist was destroying traditional standards of good design. Thus the critics aimed to reform their taste, but unintentionally created a system that removed the expression and symbolic meaning of ornament. By switching aesthetic values for moral ones, design had become supposedly predetermined on rules of honesty. However their quest for restrain in the decorative arts ultimately resulted in ornament that was flattened, conventionalised, simplified, abstracted, and then lost.