Giulio Aleni (Latin: Julius Alenius; 1582 – 10 June 1649), in Chinese Ai Rulüe, was an Italian Jesuit missionary and scholar.

[2] One of his converts, Li Jiubiao, recorded the responses of Aleni and Andrius Rudamina, one of his fellow Jesuits, to the questions and speculations of his parishioners and compiled them into a journal.

He completed the work of earlier Jesuit scholars to produce the Zhifang waiji, a global atlas written in Chinese and one of the first to include the Americas.

[4] Among his most important religious works are a controversial treatise on the Catholic Faith, in which are refuted what he saw as the principal errors of the Ming dynasty; and The Life of God, the Saviour, from the Four Gospels (Peking, 1635–1637, 8 vols.

Two of his books, Life of Matteo Ricci, Xitai of the West and Holy images of the Heavenly Lord have been presented to the public by Fondazione Civiltà Bresciana in two separate occasions, on 13 and 25 October 2010.