The Dukes of Burgundy had a jewelled "Ducal Hat" rather than a formal crown which they wore for ceremonial occasions. This hat was lost by Charles the Bold at the Battle of Grandson in 1476 when his army was routed and his baggage train was captured by the Swiss. After the battle it came into the hands of the canton of Basle who hid it. Charles the Bold was killed at the Battle of Nancy the following year and the hat re-emerged to be sold first to the Fuggers in 1506 and then later to Maximilian I, Holy Roman Emperor. What happened to the hat after this is not known. Presumably, after this it was kept for a while by successive emperors (particularly Emperor Charles V who was also the Duke of Burgundy) but at some point it was lost or broken up.