High Quality Content by WIKIPEDIA articles! The Ellicott Square Building is an office complex in Buffalo, New York, USA. It was designed by Charles Atwood of D. H. Burnham Company, and completed in May, 1896. At the time of its completion, it was the largest office building in the world. In 1896 and 1897, the building was the site of Edisonia Hall and the Vitascope Theater, the earliest known dedicated motion picture theater in the world.