蛋堡
On 8 September 1268, Gertrude's son Frederick, who had accompanied Conradin on his Italian expedition, was captured in Astura to the south of Anzio. Handed over to Charles of Anjou, he remained in degrading imprisonment in the Castel dell'Ovo in Naples until his public beheading in the Piazza del Mercato in Naples on 29 October. The following year, Gertrude was exiled and lost her claim to Windisch-Feistritz. Again, she found refuge with her family in Meissen.