New $5.5M building to house Gettysburg battlefield artifacts, fossils and more Updated Dec 16, 2020; Posted Dec 16, 2020 A rendering of the new $5.5 million Adams County Historical Society building, expected to be completed by fall of 2022. Facebook Share Historical items hanging from fossilized dinosaur footprints to a program from Abraham Lincoln’s Gettysburg address will soon find a new home in Gettysburg. The Adams County Historical Society (ACHS) has announced that, in order to provide a long-term home for their collection, they will begin construction on a new facility starting next year. The 29,000 square foot project is projected to cost $5.5 million and to be finished in the fall of 2020.