Stuttgart is purported to be the location of the automobile's invention by Karl Benz and then industrialized by Gottlieb Daimler and Wilhelm Maybach in a small workshop in Bad Cannstatt that would become Daimler-Motoren-Gesellschaft in 1887. As a result, it is considered to be the starting point of the worldwide automotive industry and is sometimes referred to as the 'cradle of the automobile', and today Mercedes-Benz and Porsche both have their headquarters in Stuttgart, as well as automotive parts giants Bosch and Mahle. The year prior, Robert Bosch opened his first "Workshop for Precision Mechanics and Electrical Engineering" in Stuttgart. In 1907, the International Socialist Congress was held in Stuttgart was attended by about 60,000 people. In 1912, VfB Stuttgart was founded. Two years later, the current iteration of the Stuttgart Hauptbahnhof was completed according to plan by Paul Bonatz from 1914 to 1927.