"Niccolò di Buonaccorso, also Niccolò di Niccolò di Buonaccorso or Bonaccorso, (active 1355 – 1388) was an Italian painter and one of the most prominent Sienese painters of the 14th century. The small body of his work that survives shows the artist's highly refined miniaturist technique. The artist was also briefly involved in local politics." - (Wikipedia (en) 08.05.2021)
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