is opened at 58 Via dei Marsi in the San Lorenzo district of Rome.

is adopted by the League of Nations.

is founded in Elsinore, Denmark, during the first International Montessori Congress.

takes place in Nice, France. Montessori delivers her lecture Peace and Education, published by the International Bureau of Education, Geneva.

takes place in Copenhagen; the theme is "Educate for Peace." Montessori delivers several lectures later collected in Education and Peace (first published in Italy as Educazione e Pace, 1949). Montessori founds the Social Party of the Child.

Maria Montessori represents Italy at the UNESCO conference in Florence. She is allowed an impromptu ten-minute slot to speak and hugely impresses the audience.

Maria Montessori speaks at the session of the Unesco Governing Board.

is adopted in an extended form by the United Nations.

is adopted by the UN General Assembly and opened for signature. By signing the convention, countries agree upon a minimum standard for the protection of the rights of children.

is founded by Renilde Montessori.

are established following the Millennium Summit of the UN at the World Education Forum, Dakar. The 191 UN member states agree to try to achieve the goals by the year 2015.

is established in April 2000 at the World Economic Forum in Senegal, Africa.

set by the United Nations General Assembly and adopted as part of the 2030 Agenda for Sustainable Development.