SS Great Eastern was an iron-hulled steamship designed by Isambard Kingdom Brunel, and built by John Scott Russell & Co. at Millwall Iron Works on the River Thames, London, England. Powered by both sidewheels and a screw propeller, she was by far the largest ship ever built at the time of her 1858 launch, and had the capacity to carry 4,000 passengers from England to Australia without refuelling. Her length of 692 feet (211 m) was surpassed only in 1899, by the 705-foot (215 m) 17,274-gross-ton RMS Oceanic, her gross tonnage of 18,915 was surpassed only in 1901, by the 701-foot (214 m) 20,904-gross-ton RMS Celtic and her 4,000-passenger capacity was surpassed only in 1913, by the 4,234-passenger SS Imperator. Her five funnels was unusual for the time. She also had the largest set of paddle wheels in existence.