On May 10, we remember three figures connected to Basel. Karl Barth, a leading Swiss Reformed theologian, was born in Basel in 1886 and returned there after being expelled from Germany for opposing the Nazis, continuing his influential work until his death. Nicolas Fatio de Duillier, a mathematician and natural philosopher born in Basel in 1664, made contributions to astronomy and gravitation theory, though he spent much of his life abroad. Sebastian Brant, the German humanist and author of The Ship of Fools, studied and taught law at the University of Basel, where he wrote much of his significant work and engaged with the city's intellectual community.