Due to the environment and the black and white nature of the woodcut, it’s possible this depicts a fur hat rather than a thrum cap.
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Hatters from Das Ständebuch (The Book of Trades), Jost Amman, 1568 -
“Winter landscape with many ice skaters, in the foreground Fischer pull a net out of the ice”, Claes Jansz, Visscher I, 1550-1612 This late 16th or early 17th century drawing shows what could be a variety of thrum caps in different shapes and colors. This is relatively unusual, as most paintings display only a single type.
Note that the gentleman on the right side seems to be wearing a skullcap-style thrum cap that has come slightly askew, which is very common in depictions of that type.
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“A Ferry Departs as St Peter Finds a Coin in the Mouth of a Fish”, Jacques Jordaens, 1621-1650 This 17th century Flemish painting shows an older man wearing what seems to be a blue thrum cap on the right. It seems likely to be in the skullcap style, which were often blue, but there could be a pointed crown hidden by the man standing in front.
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“Peasants Merrymaking Outside an Inn”, Jan Steen, 1676 Kloek, Wouter. “Peasants Merrymaking Outside an Inn (Previously “Fair at Warmond”)” (2017). In The Leiden Collection Catalogue, 4th ed. Edited by Arthur K. Wheelock Jr. and Elizabeth Nogrady with Caroline Van Cauwenberge. New York, 2023–. https://theleidencollection.com/artwork/peasants-merrymaking-outside-an-inn/ (accessed January 04, 2026).
Rule of Thrum 
