Braunschweig is about 2.1 times smaller than Vienna.

Vienna is approximately 415 sq km, while Braunschweig is approximately 193 sq km, making Braunschweig 46.46% the size of Vienna.
Tip: This to-scale comparison of Vienna vs. Braunschweig uses the Mercator projection, which distorts the size of regions near the poles.
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