Landscape architecture and garden-making have witnessed huge changes during the twentieth-century, and the impact of these will continue to be discussed and interpreted in the twenty-first. New materials and responses to different social conditions, along with new attitudes to how gardens are perceived and interpreted and above all the relationship of built work to the larger landscape of territory and society - all have challenged long-held practices of garden-making, even while those same traditions continue to be at the centre of both designers and users.