In the small Swiss town of Rapperswil-Jona, there is the need for a new city museum (stadtmuseum), on an infill site between two medieval buildings. Swiss architects MLZD came up with a spectacular gem, that denies the surroundings in form and materialization, but at the same time respects the surrounding building. The thing is: such a plan only works in a coherent site, such as a historic city center. And they took advantage of this completely, shaping the architectural body to work around the openings in both the neighboring buildings.
In the interior, this provides for different exhibition spaces, each with an identity of its own. It's no wonder that MLZD won the competition with this scheme, I think.
more? see http://www.mlzd.ch