Castellanos de Anchorena, dedicated to Catholic causes, also gave scholarships to students at the Pontifical Latin American College in Rome.

She was ennobled by Pope Pius XI and awarded the Pontifical Golden Rose, becoming the first Argentine to be made a papal marchioness.

[3][7] Castellanos de Anchorena also gave scholarships to students at the Pontifical Latin American College in Rome.

Her dedication to Catholic charities lead to her being ennobled as a papal marchioness by Pope Pius XI, who also awarded her a Pontifical Golden Rose.

[3] In 1894 she purchased an Italianate mansion in Belgrano and gave it to her daughter, Josefina, as a wedding gift in 1903 when she married Enrique Larreta.