To many Americans who grew up with Twinkies, this is hallowed ground. Almost 85 years after it started making those yellow creme-filled sponge cake snacks, the Schiller Park, Ill., bakery is turning off its ovens for good, according to Hostess Brands on Wednesday.The facility was reopened in July 2013 after the company's bankruptcy and acquisition by private equity firms Apollo Global Management and C. Dean Metropoulos & Co. Hostess treats were off the shelves for eight months allowing competitors to introduce "knockoff" products that may have hurt the company's sales, the Chicago Tribune said. "As a result, we have invested in more efficient production capabilities and need to streamline our manufacturing infrastructure and protect our ability to compete," said Hostess CEO Bill Toler, according to the newspaper. Originally, Hostess had 11 plants with a union workforce; however, after the closure of the Schiller Park facility in suburban Chicago, that number will be down to three. This closing will affect about 400 employees, the Tribune said.