sentences:  After Nobunaga and his son, Nobutada, died during the Incident at Honnō-ji in 1582, many of their personal treasures were moved to the temple.In 1600, when Oda Hidenobu was responding to Ishida Mitsunari's call for assistance, Fukushima Masanori and Ikeda Terumasa sieged the castle and destroyed it during the Battle of Gifu Castle.Hidenobu's vassals died during this siege and, after the destruction of the castle, the blood-stained floor of the castles main tower was used to create the new "Blood Ceiling" in the temple.