The Aeolian Company was founded by New York City piano maker William B. Tremaine to make automatic organs, and automatic piano to provide entertainment in the mansions of millionaires, an extremely profitable undertaking in the late nineteenth century. Aeolian virtually cornered the market in this trade. In February, 1927, to celebrate its move to the Aeolian Hall on Fifth Avenue in New York City, the company produced this volume, as a guide to its new establishment, which it presented to many of its distinguished patrons.
http://www.pianola.org/factsheets/aeolianhalls.cfm
For a history of the building, see
http://www.thecityreview.com/fifth689.html
