Opera Nazionale Montessori

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.

ONM has the task of preserving and disseminating Dr. Maria Montessori's thought and work, of developing the historic and scientific heritage, and of guaranteeing the ideals and practice of her methods.