Gret Loewensberg
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Margaretha "Gret" Loewensberg is a Swiss architect. As the wife of Swiss Federal Councillor Moritz Leuenberger, she held the unofficial title of First Lady of Switzerland in 2001 and 2006, while her husband was President of the Swiss Confederation.
As an architect, Loewensberg has made a name for herself in particular in the field of domestic architecture.