When the short but bloody
Boxer Rebellion broke out in
Peking in June 1900, and the
Empress Dowager Cixi issued the
Imperial Decree of declaration of war against foreign powers, Grassi was urged to flee. He responded, "Ever since I was twelve, I have desired and also asked God for martyrdom. Now that this longed-for hour has come, must I run away?" At the beginning of July, the Provincial Governor of Shanxi,
Yuxian, ordered the arrest of the European missionaries in the province. On 4 July, a mob attacked the Franciscan mission in
Hengyang (southern
Hunan), murdering one of the friars, Cesidio Giacomantonio, and burning the mission to the ground. A few days later, on 7 July, the friar who served as
Apostolic Vicar of Southern Hunan, bishop
Antonio Fantosati, and his companion, the friar Giuseppe Maria Gambario, were attacked while returning to the mission in Hengyang. Both were killed. On 27 June 1900, Grassi described the situation of Christians in the Shanxi province in a letter, saying, "The European establishments... are seriously threatened by the mob, united with the Boxers and the soldiers: a catastrophe could occur at any moment. The gates of the city are open, but they are guarded by the Boxers, who prevent the travel of Christians. Now, in the outskirts, we are in the throes of a real revolution: nothing and no one can be said to be safe." During the night of 5 July 1900, Grassi, along with fellow bishop
Francis Fogolla, three friars, seven
Franciscan Missionaries of Mary, 11 Chinese members of the
Third Order of St. Francis, of whom six were
seminarians, and three employees of the Taiyuan Mission were imprisoned by Boxer forces. On 9 July 1900, Grassi, along with the rest, was escorted from prison with his hands bound behind his back to a public trial presided over by Yuxian. After a
show trial, the group was sentenced to death. Grassi was stripped naked before a crowd of onlookers, and Yuxian himself cut Grassi to pieces with a sword. His heart was removed from his body and delivered to Chinese Buddhist monks so that they could study its alleged occult powers. By custom, Grassi's head was severed from his corpse so that it could be put on display in a small cage at the city entrance. What remained of his corpse, along with the corpses of all the others killed that day, was tossed over the city wall and left unburied so that dogs would eat the remains. These killings are known as the
Taiyuan massacre. Throughout China during the Boxer Uprising, 5 bishops, 50 priests, 2 brothers, 15 sisters and 40,000 Chinese Christians were killed. The 146,575 Catholics served by the Franciscans in China in 1906 had grown to 303,760 by 1924 and were served by 282 Franciscans and 174 local priests. ==Veneration==