ernestineschumannheink

At the Liberty Bond Theatre, in front of the New York Public Library on 5th Avenue.
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Wikipedia says:
Ernestine Schumann-Heink (15 June 1861 - 17 November 1936) was a well-known operatic contralto, noted for the great control, tone, beauty, and wide range of her singing. Link follows:

en.wikipedia.org/wiki/Schumann-Heink

Thanks! We'll add her first name to the source data and reload the description.

Two of Ernestine Schumann-Heink's children were daughters,
Charlotte Heink was born ~1884
Marie Theresa Schumann was born ~1896

The boy looks compatible with her youngest son, born 12 Dec 1898 in New York.
- www.findagrave.com/memorial/195890346/george_washington_s...

The daughter here might be Marie Theresa (Mizzi).
- www.findagrave.com/memorial/111173868/marie_therese_fox

The older daughter, Charlotte can be seen with Marie in one of the photos at
- www.findagrave.com/memorial/239680129/charlotte_greif

To me, the daughter in this picture is a better match to Marie than Charlotte. Marie was first married in 1915.
See www.newspapers.com/article/lancaster-new-era-marriage-of-...
So this picture is probably no later than 1915.

Aside 1: According to www.balboaparkhistory.net/glimpses/scheink.htm
"In February 1906 she returned to Germany where she succeeded in getting six of her eight children out of the country. August, a merchant seaman, and Charlotte, the wife of Doctor Grief [Greif] in Leipzig, remained behind. According to German law, Schumann-Heink, by marrying a foreigner, had forfeited her property in Germany. Also, her boys were required to serve in the army before they could leave the country. The German courts decided the boys and daughter Marie could accompany her to America and that she could retain one-third of the money in Germany as she, rather than her deceased husband, had earned it. Her home in Germany was confiscated, and she had to buy it back."

Aside 2: According to www.balboaparkhistory.net/glimpses/scheink.htm
"While she was singing in the 1914 Bayreuth Festival, World War I began. She ordered her chauffeur to put an American flag in front of her automobile. The flag placated officials looking for enemy agents and enabled her to reach the American consul at Coburg. After a roundabout route which took her to Copenhagen, she, her son George Washington, her daughter Marie, and her accompanist, Mrs. Katherine Hoffman, finally sailed for America on a Holland-American liner out of Rotterdam."