List of public art in the City of Sydney  Public art in the City of Sydney in New South Wales, Australia includes a wide range of works across a range of genres and for a range of purposes or combination of purposes. Some are purely artistic, some are commemorative, some are both. Some are monuments or memorials; some are also fountains and some are site-specific and in some buildings, such as Australia Square and Grosvenor Place by Harry Seidler and Aurora Place by Renzo Piano, the art is a component of the architect's intentions. Occasionally, works are removed or repositioned. The City of Sydney has a Public Art Policy and conservation work is carried on from time to time to maintain the works. The materials used vary widely but include traditional marble (such as in "Touchstone") and bronze (such as in the "Archibald Fountain") as well as steel (such as in "New Constellation" and "I Stay"), concrete (such as in "I Wish" and "Barrel Roll") and newer materials like aluminium (such as in "Vine" and "Morpho"). In the 21st century, kinetic, musical, and conceptual works began to appear. Notable sculptors from around the world are represented in works on public display in Sydney. For example, Bertram Mackennal and Bronwyn Oliver were Australian; Gilbert Bayes and Henry Moore were British; François-Léon Sicard and Henri Alfred Jacquemart were French; Alexander Calder and Jenny Holzer are American; Kan Yasuda and Jun'ya Ishigami are Japanese. Some memorials (such as the "Levy Drinking Fountain") are in the form of a fountain; others (such as William Dalley) are in the form of a portrait statue. The "Lawson Memorial" commemorates a writer; "John Christie Wright Memorial Fountain" commemorates a sculptor; the "Dobell Memorial" commemorates a painter, the "Morshead Fountain" commemorates a soldier; "Il Porcellino" commemorates surgeons. As well as memorials to individuals or groups, matters of importance to Sydney such as navigation and the environment are also commemorated. The bronze portraits of James Cook, Arthur Phillip and Matthew Flinders also pay tribute to their skills in exploration and navigation. Recurring themes include flora, children and classical or abstract allusion. Local flora is represented by sculptures such as "Veil of Trees", "Edge of the Trees" and "Into the Trees II."