The paper introduces and discusses Strappo ad Asolo from 1973, a site-specific artwork by Dorothee von Windheim along with its vast documentation preserved at the Conz Archive in Berlin. The findings are based on the research in the archive conducted in the fall and winter of 2018 as well as the correspondence with Dorothee von Windheim. In the first part, the figures of the collector and curator Francesco Conz and the artist are introduced. The account of their activities in the early 1970s is followed by the description of their meeting and production of Strappo ad Asolo in 1973. In the latter part of the article, I look closer at the ontology of Dorothee von Windheim’s artwork and its uniqueness in the wider context of the site-specific art of the 1960s and 1970s as well as reflect on the documentation process as a part of the performative site-specific practice. In order to analysie Strappo ad Asolo, the notions of framing (Immanuel Kant, Jacques Derrida, Craig Owens) and index (Rosalind Krauss) are employed. In the final remarks, the importance of Strappo ad Asolo-both for Dorothee von Windheim and for Francesco Conz-is underlined.