Zaha Hadid's 1993 Weil am Rhein structure — her built breakthrough, with its sharp shard-like concrete forms.
From Wikipedia
The Vitra Fire Station is a concrete and steel building of 852 m2 (9,170 sq ft) located at the Vitra Furniture factory in Weil am Rhein, Germany. Completed in 1993, it was the first constructed project by Iraqi architect Zaha Hadid.