Blaise Pascal would be celebrating today, 19th June, his 400th birthday. Born in Rouen, France, Pascal was a mathematician, physicist, inventor, philosopher and Catholic writer known for his works on projective geometry or probability theory and for being one of the inventors of the mechanical calculator. Two of his most important works are Lettres provinciales and the Pensées.
He was a pioneer in the natural and applied sciences, like his contemporary René Descartes, and clarified some of Torricelli’s concepts like pressure and vacuum. That’s why the unit of pressure in the International System of Units is named pascal after him.
We can find 1,015 results related to Blaise Pascal in Archives Portal Europe, from 13 countries, here
Archives Nationales, Testament de Blaise Pascal, available here