Signe Hammarsten-Jansson Signe Hammarsten-Jansson Signe "Ham" Hammarsten-Jansson (née Hammarsten, 1 June 1882 Hannäs, Sweden - 6 June 1970 Porvoo) was a Swedish graphic artist who designed, among other things, around 220 Finnish postage stamps during the course of three decades. She was the mother of Tove Jansson, creator of the highly successful "Moomin" characters. Signe Hammarsten came from a respectable Swedish clerical family and was the child of a pastor's daughter and a court chaplain. Hammarsten's parents were opposed to her becoming an artist, and as a girl she had considered a career as a surgeon. Hammarsten went through 8 years of
Tove Jansson her father, Viktor Jansson, was a sculptor, and her mother, Signe Hammarsten-Jansson, was a Swedish-born graphic designer and illustrator. Tove's siblings also became artists: Per Olov Jansson became a photographer and Lars Jansson an author and cartoonist. Whilst their home was in Helsinki, the family spent many of their summers in a rented cottage on an island near Borgå, 50 km east of Helsinki. Jansson studied at University College of Arts, Crafts and Design, in Stockholm in 1930–33, the Graphic School of the Finnish Academy of Fine Arts in 1933–1937, and finally at L'École d'Adrien Holy and L'École des Beaux-Arts