Sears, Roebuck and Co. colloquially known as Sears, is an American chain of department stores founded by Richard Warren Sears and Alvah Curtis Roebuck in 1893, and was reincorporated by Richard Sears and Julius Rosenwald in 1906. Formerly based at the Sears Tower in Chicago and currently headquartered in Hoffman Estates, Illinois, the operation began as a mail ordering catalog company and began opening retail locations in 1925.