Rosendal had many contacts to the
liturgical movement in the
Roman Catholic church, especially in
Benedictine monasteries, and personally knew many theologians of the liturgical and ecumenical movement, such as
Pius Parsch and
Paul Couturier. He also had plenty of contacts with
Anglo-Catholicism in the
Church of England, e.g. Dom
Gregory Dix, and was member of
Fellowship of Saint Alban and Saint Sergius. Rosendal often liked to portray himself as Catholic as possible, but was also rooted in the theology of 17th-century
Lutheran orthodoxy, which he knew well. On the recommendation of
Bo Giertz he began to read books by
Carl Olof Rosenius, which made a lasting impression. Rosendal himself used the
neo-Thomistic paradigm and resisted all kinds of
liberal theology as well as the
dialectical theology of
Karl Barth. Rosendal was one of the theologians that worked for the foundation of the
International League for Apostolic Faith and Order (ILAFO). == Legacy ==