The composer Agathe Backer-Grondahl died at the age of 59. Here is all you want to know, and more!
Biography - A Short Wiki
Known for her contributions to the golden age of Norwegian music and for the many future pianists she taught. Her compositions initially adhered to 1850s European pianistic and stylistic ideals, but as the 20th century neared, she began to adopt an impressionistic approach, making her the first Norwegian impressionist.
She was married in 1875 to singing teacher and conductor Olaus Andreas Grondahl. Her son Fridtjof Backer-Grondahl became a pianist and composer.