International Union of Operation Engineers - Benton Park neighborhood, St. Louis, MO
Posted by: 
YoSam.
N 38° 36.008 W 090° 13.451
15S E 741731 N 4276058
The Operating Engineers have been in this building since 1941
Waymark Code: WMM550
Location: Missouri, United States
Date Posted: 07/23/2014
Views: 3
County of building: St. Louis Independent City
Location of building: 2929 S. Jefferson Ave, Benton Park, St. Louis
"John Hahn
Birth parents unknown. Raised in orphanage.
Later owned a livery stable in St. Louis at Jefferson and Arsenal Streets. reportedly opened one of the first funeral homes in St. Louis as part of his livery business. Listed in ?St. Louis City Directory, 1890(?) as occupation, livery(?), at 2929 S. Jefferson Avenue."
"1900
Listed as President of Benton Park Livery & Undertaking Co., 2929 S. Jefferson" ~ rootsweb
IN 1922 it was still and Undertaker and Livery business:
"Newspaper Obituary, Saint Louis Post Dispatch, September 7, 1922, page 27, 'CARPENTER' -
Entered into past on Wednesday, September 6, 1922, at 8:45 p.m., Clara Lorinda Carpenter (nee Leighton) dearly beloved wife of Charles F. Carpenter, dear mother of Mildred and Pearl Carpenter, dear daughter of Noah and Clara Leighton, and our sister, sister-in-law, and aunt aged 33 years. Funeral on Saturday, September 9, 1922, at 2 p.m. from family residence, 1526 Mississippi.
Undertaker: Witt Bros. L & U Co., 2929 South Jefferson. She was buried on 6 SEP 1922 in Parklawn Cemetery, St. Louis, St. Louis Co., Missouri. Section 2, Lot 82, Grave 7 NO MARKER" ~ Family Tree Marker
Gateway Real Estate
1900 thru 1920 it was: Witt Brothers Limosines & Undertaker, 2929 S. Jefferson Ave.
This is all the information I could glean for this address and this building. I figured the business and who worked there gave some insight into what the builder had in mind for the art work