Presidents and First Ladies Trivia

[Eva Elisabeth]

I hope it's OK I post this here because it is not more US /Lincoln related than the intro, but it's a fun piece of trivia with an interesting background I think you will enjoy.

Lincoln has been the only US president so far to hold a patient.
One German head of state was quite inventive, too, holding even two patients, one of which was granted in Austria (and UK) because of the basic "different" German understanding of the matter of his invention.

Any idea?