Johannes Gerardus Maria Willebrands was a Dutch Cardinal of the Roman Catholic Church. He served as President of the Pontifical Council for Promoting Christian Unity from 1969 to 1989, and Archbishop of Utrecht from 1975 to 1983. Elevated to the cardinalate in 1969, Willebrands was central to the increased ecumenism of the Church in the second half of the 20th century, and was considered papabile at the two conclaves held in 1978.

The Catholic Church in the Netherlands is part of the worldwide Catholic Church under the spiritual leadership of the Pope in Rome. Its primate is the Metropolitan Archbishop of Utrecht, since 2008 Willem Jacobus Eijk. In 2015 Catholicism was the single largest religion of the Netherlands, forming some 23% of the Dutch people, based on in-depth interviewing, down from 40% in the 1960s.