Michizane is the fullest documented case of the goryō mechanism working. He was a scholar-official of modest family who rose to the second-highest post at court on merit, was outmanoeuvred by Fujiwara no Tokihira on a charge of plotting, exiled to a nominal post in Dazaifu in 901 and dead by 903. Then Tokihira died at thirty-nine, the crown prince died, the palace was struck by lightning in 930 killing several courtiers present, and the emperor died soon after. The court restored Michizane's rank, burned the decree of exile, promoted him posthumously, and built Kitano Tenmangū in 947. Over centuries the angry ghost became the patron of learning and calligraphy, and today Kitano and Dazaifu are packed with teenagers before entrance examinations, hanging wooden plaques with the name of the school they want. Plum trees are planted at his shrines because of a poem he wrote to his plum tree on leaving Kyoto, and the tree is said to have flown after him.