League of God's House
In 1468 Greifenstein, along with several other of the Bishop's castles, were attacked and occupied by the League of God's House. The castles were returned to the Bishop following intervention by the city of Zurich. In 1537 Filisur bought the rights to rule themselves from the Bishop and the castle lost its importance. It was abandoned and rapidly fell into ruin. In 1550 it was mentioned as being mostly destroyed. However, the roof remained in good repair until about 1840. When the roof finally collapsed, part of the castle was broken up for stone for the new school house in Filisur.