early 20th century salvaged chicago interior varnished birch wood office door with oversized "glue chip" glass recessed panel removed from historically important conway building (now burnham center). the richly grained door with nicely aged varnished finish retains the original plate glass panel free from breaks or cracks. great overall condition. the burnham center (originally known as the conway building) was built on the site of the former chicago opera house (built in 1885). the conway building was a real estate project resulting from the estate of marshall field, who had died in 1906. field requested that his $83 million estate be invested in chicago real estate until his grandson, marshall field iii, turned fifty in 1943. field's estate was invested in existing property, in addition to funding three major projects - the pittsfield building (1927), and the field building (1934). daniel burnham was a frequent associate of field, designing an annex to the marshall field and company building (1892) and the field museum of natural history (1900). burnham, with frederick p. dinkelberg, completed his design for the building shortly before leaving chicago in april 1912; he died in germany two months later. the building resembles burnham's flatiron building in new york city: both buildings are twenty-one stories, have rounded corners, and are decorated in a beaux-arts style. both buildings are thought to be influenced by the palazzo di propaganda fide in rome. ernest r. graham, peirce anderson, and edward probst assumed control of the project on april 30. it was completed under the auspices of graham, burnham & co. (a precursor of graham, anderson, probst & white) in 1913 .