 Thus , the Florence Cathedral is the repository of all the extant works of Uccello whose attribution is firmly rooted in contemporary documents : two murals — the Hawkwood and the Clock Face with Four Heads of Prophets or Evangelists ( 1443 ) — and two stained glass windows — Resurrection ( 1443 – 1444 ) and Nativity ( 1443 – 1444 ) . The Hawkwood is Uccello 's " earliest dated and fully authenticated extant work " . 
