An artefact is an object modified or made by man from natural materials for a specific purpose. The document discusses famous artists who work in different mediums like paintings, buildings made of cardboard, and clothes made from newspaper. It also lists Grayson Perry, Elizabeth Le Court, Wafa Hourani, and Michael Raedecker. Artefacts have affected creative and media industries like visual arts, media, and theatre by enabling logos, props, and stage sets. Visual arts displays artefacts as art that can be seen in 3D. Media relies on artefacts for logos, posters, and marketing materials. Theatre depends on artefacts for props and stage designs.