The seller was unaware that the document originated from the 15th century and was authored by King Afonso V of Portugal. Initially, it wasn't even suspected that the document put up for sale was ...

He was court painter for Afonso V of Portugal from 1450 to 1471, and in 1471 he was appointed the official painter for the city of Lisbon. His surviving masterpiece is the polyptych known as the Saint ...