This paper discusses hypermedia aspects of the design of a Virtual Project Room. Based on ethnographic and participatory design studies of landscape architects' and architects' work, prototypes for a notion of virtual project rooms , supporting remote collaboration, is developed. Since (landscape) architects work with 3D objects and environments a natural first step is to design a virtual project room as a 3D virtual environment. The current prototype, Manufaktur, utilizes open hypermedia

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... logy to integrate documents with design models in the virtual project room. Manufaktur provides hot-linking of arbitrary MS Windows documents into the virtual project room, it supports spatial arrangement and categorization of (sub) workspaces by means of proximity, and it provides "classical" open hypermedia linking between segments of documentation. Finally, support for two modes of tightly coupled collaboration in the virtual project room is being provided by means of a session management service. Based on the experiences from design of Manufaktur we discuss design issues for the integration of hypermedia and collaborative virtual environments.