Pirelli was founded 1872 in Milan by Giovanni Battista Pirelli. Pirelli initially worked in rubber and related processes. The company used to make scuba diving rebreathers (a special type of underwater breathing machine). Pirelli's activities are still focused on the building of tyres and cables (for energy and telecommunications). In 2005, Pirelli sold its cable division to Goldman Sachs, which changed the new group's name to "Prysmian".