One became an artist by first becoming an apprentice for an artist. At the age of twelve they would work as an apprentice and hopefully join the workshop of their master artist. After working there as an apprentice for many years doing jobs such as sweeping, running errands, preparing wooden panels for painting and grinding and mixing pigments, the apprentice would gain skills and would learn from his master. He would draw sketches, copy paintings, cast sculptures, and assist the master in creating art works. Some students would paint the background or smaller figures in paintings while their masters painted the main picture. If a painter became a master they could have apprentices of their own and open their own workshop so they could sculpt, paint, goldsmith, be an architect and engineer.