The Boeing Everett Factory, in Everett, Washington, is an airplane assembly building owned by Boeing. Located on the northeast corner of Paine Field, it is the largest building in the world by volume at 13,385,378 m3 (472,370,319 cu ft) and covers 399,480 m2 (98.3 acres).[1] It is where wide-body Boeing 747s, 767s, 777s, and the new 787 Dreamliner are assembled. Plans for the factory were first announced in 1966 for it to be the site of the construction of the 747 after Boeing was awarded a $525 million contract from Pan American World Airways to build 25 747s. It purchased 780 acres north of the then little-used Paine Field, which was operated by the US Army in World War II. Boeing had an Everett presence since 1943[2] In 1968 it began offering factory tours with the first roll out of the 747.