Systematic research into contact varieties of DutchThe purpose of this article is to show that the compilation of a corpus of Dutch contact varieties, CoVaCo, will offer new and interesting possibilities for research. Paragraph 2 gives an overview of Dutch contact varieties and the texts available in these varieties, digitally or in printed form. This proves that building CoVaCo is feasible. Paragraph 3 presents a number of limited case studies to show the research potential of CoVaCo. Finally, in paragraph 4, I ask researchers for practical support in building CoVaCo.