The Imperator class ocean liners were a series of three ocean liners designed for the Hamburg America Line, commonly known as HAPAG. These three ships were commissioned by the chairman of HAPAG Albert Ballin. Namely the Imperator (1912), the Vaterland (1913) and the largest, the Bismarck (1914). These liners were over 50,000 tons, sported three funnels and had a length ranging from 906 ft (276 m) to 956 ft (291 m). To this day, the Vaterland is the largest passenger ship operated by a German shipping company.