To recall three hundred years from the death of the Portuguese missionary Tomás Pereira, a symposium is taking place in Lisbon (Portugal) from November 10th to 12th. This international symposium will be named "Emperor Kang Xi and the Jesuit Mission in China". The organizers of the initiative include the Matteo Ricci Institute of Macao, the Classical University of Lisbon and the Oriental Institute, in collaboration with the Centre of Christian Studies of the Institute for the study of world religion of the Chinese Social Academy, the Centre for the study of sinology abroad of the University of Foreign Languages of Beijing, the Chinese and Portuguese Province of Jesuits, the Historical Institute of Jesuits in Rome, and the Oriental Foundation of Portugal. Father Tomás Pereira (1645-1708) is one of the key figures for the history of the Church in China. He actually gained the confidence of Emperor Kang Xi by playing a fundamental role to appease controversies originating from Chinese rites. As representative and protector of the mission, he became court mandarin, thus joining Chinese diplomacy. He restored the church devoted to the Immaculate Conception of Mary, established by his Jesuit brother and missionary, Father Matteo Ricci. In China, too, in Macao, there will be another conference devoted to the memory of the Jesuit priest, from November 27th to 29th.