Since the 1965 Pampus plan innumerable designs have been made for the urban extension in the IJmeer. The site became topical again in 1995. Our design deviates from the intention to dyke in and reclaim the IJmeer with the aim of adding a new urban lobe. In our proposal the model of a finger city has been converted into a loosely arranged archipelago. The openings between the islands safeguard the visual and ecological transparency of the archipelago. The difference between the lee and the rough water surfaces allows differentiation in the contours of the shoreline: from tree-lined dykes in the north, via quays, to waterside gardens in the south. While the composition of the archipelago as a whole is slightly whimsical, the public spaces on the islands have a simple geometric structure. Within this structure each project establishes its own relationship with the city and the landscape. Besides residential and work areas, IJburg has a marina, a beach, a transferium, a cemetery and various new nature reserves.