Citroen DS, a wonderful car. I LIKE the way that they look, but I'm British so that explains a lot. The Citroen with the Wankel engine was a GS birotor and actually went into production. Due to the usual problems with the Wankel, Citroen bought the cars back and had them crushed but there were survivors that still come up for sale from time to time.
The GS was fitted with their air-cooled four cylinder 1220cc engine. Wonderfully engineered cars.
I have owned several Citroens and found them to be wonderful, reliable and quirky.