 In the 1870s philanthropist Charles Wallace funded the installation of numerous ornate drinking fountains across Paris, and over 100 Wallace Fountains are still in use.Decorative street lamps in cast iron were used all over the world, from gas lamps in the second half of the 19th Century to electric ones in the first decades of the 20th - a collection of examples used in California in the 1920s and 30s now form a display outside the Los Angeles County Museum of Art, called Urban Light.When underground trains were established in the 1890s-1900s, the stairs located in pavements were often housed in elaborate cast iron structures, notably the long demolished New York City Subway entrances (one survives at City Hall station outside New York City Hall), and the famous Art Nouveau Paris Métro entrances by Hector Guimard.