[2] The majority of the 1,200 Mennonites who came to Uruguay in the aftermath of World War II lived for about 400 years in the Vistula delta until they were expulsed.

They spoke and party still speak Plautdietsch, the language which developed in the Vistula delta and which until today unites all conservative "Russian" Mennonites, that have their origin in that region.

The second group of immigrants, comprising 429 persons, arrived 19 October 1951 and founded the Gartental Colony in 1952.

Each settlement has a school, retirement center, and a hospital-nursing home: In 1986 the four Russian Mennonite congregations had a membership of 525.

[3] Because only baptized adult members are counted, the whole Mennonite population including children is somewhat higher.