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Private company

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.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Aug 8, 1924Founded1

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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.2

Corporate structure

Opera Nazionale Montessori sits at the top of its group. 2 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Opera Nazionale Montessori
    • Biblioteca dell'Opera Nazionale Montessori Subsidiary ยท Rome, Italy

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Subsidiaries and ownership

Subsidiaries

  • Biblioteca dell'Opera Nazionale Montessori

From Wikidata.1

Timeline

  1. Aug 8, 1924Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2