Located on Albert Street, directly behind the Eaton's Main Store and Toronto's (now former) City Hall, the Eaton's Annex was a 10-storey building containing both retail and office space. By 1900, the Eaton's department store owned almost all of the lands within the city blocks bordered by Yonge Street, Queen Street West, Bay Street and Dundas Street, and the land was occupied by the Eaton's Main Store, the Annex building and various Eaton's warehouses and mail order buildings. The Main Store and the Annex, however, were the only two buildings open to the public. In 1900, the two buildings were connected by an underground passageway open to both employees and shoppers.