In addition to being a military leader, he was a skilled diplomat and had the confidence of the Pope, the Emperor and the French and English kings.

After he died in 1328, Otto's brother William moved to England, where he was also successful and was the founder of the line of the Lords of Grandisson.

Hugo of Grandson was sentenced to death for allegedly forging documents, but fled to England, where he mysteriously died.

John II of Grandson was convicted of forgery and sedition against the Duke of Burgundy and sentenced to death by suffocation.

[4] In the late 15th century, Grandson Castle belonged to Jacques de Savoie, an ally of Charles the Bold.

In late February 1476, Charles the Bold brought a large mercenary army with him together with many heavy cannons.

While very few of Charles' soldiers were killed, the Swiss had humiliated the greatest duke in Europe, defeated one of the most feared armies, and taken a most impressive amount of treasure.