June 12 - Dutch fleet under admiral de Ryuter burns Sheerness, sails up to river Medway, raids Chatham dockyards and escapes with the royal barge The Royal Charles.
June 15 - The first human blood transfusion is administered by Dr. Jean-Baptiste Denys. He transfuses the blood of a sheep to a 15-year old boy. (Though this operation is a success, a later patient dies from the procedure and Denys is accused of murder).
Louis XIV of France abolishes the Livre Parisis (Paris Pound) in favor of the much more widely used Livre Tournois (Tours Pound). He also designates Gabriel-Nicolas de la Reynie as first chief of "police" of Paris