File:Duchessaoldenburg.jpg

{{Information

| description = Duchess Altburg Marie Matilda Olga of Oldenburg

| source = Original publication: Published as a postcard in Europe.

Immediate source: Private Collection – Wartenberg Trust

| date = 1907. The Wartenburg Trust asserts that all the images in their collection were published in Europe as postcards or prints prior to 1921.

| author = Hofatelier H. Busing, Oldenburg

}}