Italian primitives, masterpieces of the Middle Ages

[Fed]

What is interesting this artist? The modern sales at auction of Italian primitives.
What's so interesting - Archival documents provide information only about the last ten years of life, Pietro di Giovanni d'Ambrodzho. It is known that in 1428 he became a member of the Sienese Guild of Artists, and his teacher was the most likely Sassetta.

  Researchers suspect that he had a short life. Years of life calculated very roughly Pietro di Giovanni d'Ambrodzho Pietro di Giovanni d'Ambrogio; approx. 1410, Siena - 1449, ibid) - Siena school.

  This question is particularly interesting in a historical perspective, in 1348 the plague killed in Siena, 2 /3 of the population. Siena was unable to recover from this blow for centuries. After this series of rebellions, and wars.
  Ie trend is clear, is taken the young artist about whom virtually nothing is known, and - started ...

 Others work like no additions. Authentic?