Opera Nazionale Montessori (ONM) is an Italian cultural institution and publishing house established on 8 August 1924. Based in Rome, Italy, it is an organisation for research, training, consultancy and dissemination of Montessorian scientific and methodological principles and ideals.
In line with the original intentions of its founder, Maria Montessori, ONM has the task of preserving and disseminating her thought and work, of developing the historic and scientific heritage, and of guaranteeing the ideals and practice of her methods. 
ONM is active in the education field by promoting initiatives, at national and international level, for training, research and exchange with various institutional bodies. It has ongoing relations with the Italian Ministry of Education, Ministry of Foreign Affairs and of Social Policies, as well as universities, research and training centres, professional associations and the media.
Educational institutions run by ONM.
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