She was the director, chief editor and publisher of the popular newspaper Hwad Nytt??
Anna Hammar-Rosén was the daughter of the vicar Anund Hammar and Elisabeth Maria Agrell.
When he died the following year, Anna succeeded him as chief editor and managed the paper until 1795.
Several of the most famed writers of the Gustavian age were published in the paper: Bengt Lidner and Anna Maria Lenngren (1775) both debuted there.
Anna Hammar-Rosén was not the first woman editor and journalist in Sweden - Margareta Momma had debuted as such already in 1738 - but in contrast to many other women, she did not publish herself anonymous pseudonyms, which was otherwise the common custom for female journalists of the time.