ウェブCatholicism. Signature. Catherine de' Medici (Italian: Caterina de' Medici, pronounced [kateˈriːna de ˈmɛːditʃi]; French: Catherine de Médicis, pronounced [katʁin də medisis]; 13 April 1519 – 5 January 1589) was an Italian [a] ( Florentine) noblewoman born into the Medici family. She was Queen of France from 1547 to 1559 ...