[4] IKUE organizes Masses during Esperanto meetings, and also each year its own week-long international convention.
Associations and local groups of Catholic Esperantists also offer meetings (Bible weekends, youth camps, etc.
)[citation needed] IKUE publishes Christian literature in Esperanto, e.g. the ecumenical prayer and hymnbook ADORU[5] of 1,472 pages in 2001 (co-edited with the Protestant Esperantist association), and the encyclical Deus caritas est in 2006.
[7] Pope Pius X welcomed the Esperanto movement and gave his Blessing to the first congress of Catholic Esperantists in 1910.
In 1990, the Congregation for Divine Worship and the Discipline of the Sacraments approved the Esperanto translation of the prayers of the Mass.