Petra’s artistic training began by attending the Muthesius Kunsthochschule in Kiel. Between 1973 and 1976, she studied communication design before moving into fine arts and free graphics (etching, lithography, drawing, and illustration) from 1977 to 1982. In 1977, she and Andreas began to work together on etchings with exhibitions in both Germany and Italy. By 1981, they settled in Sardinia where they built their home studio.