There have been earlier discussions about what organizations Mary would patronize. I was looking at the Crown Prince's website and they list a few. Here is the list with a description.
Copenhagen International Fashion Fair
The Danish Association for Mental Health
The Danish Association for Mental Health is an NGO which was founded in 1960. The association advocates greater understanding and tolerance of people with mental health problems and their families and seeks to take and support initiatives to promote mental well-being, prevention and recovery. The association has some 5000 members and branches in all regions of the country.
The Christmas Seal Foundation
The Christmas Seal Foundation is founded in 1904, and is specially known for the first Christmas seal in the world.
The Christmas seal are used to raise money to help children.
The foundation owns 4 Christmas Seal Homes, where children aged 6-14 are offered a 10 weeks stay. Every year, the foundation helps 700 children to get a better and happier life.
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The Danish Mental Health Fund (PsykiatriFonden)
The Danish Mental Health Fund (PsykiatriFonden) is a private humanitarian fund. Its aim is to increase the knowledge and awareness of mental illness, causes, prevention and treatment. The fund informs the public through conferences, education of school children, business consultancy as well as through the fund's own magazine, books, helpline and homepages.