By 1900, the centre of business had moved west of the historical Town of York site. A new downtown to the west of Yonge and King Streets was built. The City of Toronto moved into a new City Hall, built at the head of Bay Street at Queen Street. Much of this new downtown was destroyed in the Great Toronto Fire of 1904, but it was quickly rebuilt, with new taller buildings. South of downtown, the railways dominated most of the lands. A new viaduct was built to carry the main lines and eliminate the many at-level crossings. A single Union Station was built to replace the several railway stations of the rail lines. It sat empty for a while over disagreements between government and the rail companies.