© Photo: HAM Helsinki Art Museum Marttojen muistokivi/ Marttaliitto memorial stone Artist Tuntematon/Okänd/Unknown , Helsinki Marttaliitto (The Martha Organization/Home Economics Extension Organization) and its Swedish-speaking counterpart Finlands svenska Marthaförbund celebrated their 70th anniversary on May 9, 1969. The organizations planted three Siberian crab apple trees to commemorate the anniversary and included a memorial stone with a text explaining the meaning of the trees. Read more.. At map
