Sub-series consists of approximately 500 postcards and icons collected by Nouwen. The postcards are blank except for three which contain letters on the verso. Nouwen maintained the collection of postcards and icons in three plastic index card boxes. The first section contains postcards largely of a religious nature, including architecture churches, monasteries, etc. from around the world) and artwork by Van Gogh, Chagall, Rodin, Degas, Renoir, Barlach, and others, as well as postcards of New York. Also contains a photograph of a sculpture of Jesus on the cross and the three postcards with letters.
The second section contains postcards of a religious nature, including architecture (churches, monasteries, etc. from around the world) and artwork by Renoir, Van Gogh, Rodin, and others. Also contains postcards of people, flowers and nature scenes, and scenes of places from predominantly around the US.
The third section contains envelopes of icons and postcards. The envelopes are labelled "Icons", "Marthe Robin", "Archives", "Abbey of the Genesee", "Marthe Robin", "Genesee", "Rembrandt", "Check For Archives" and "Freiburg Cards". Also contains some loose cards in the back, as well as a photograph of a picture of Edith Stein in 1925 and a photograph of a church, inscribed in Dutch on the back. This box also contains icon ordination cards from the 25th anniversary of Nouwen's ordination.