Hagiography (pronounced /ˌhæɡiˈɒɡrəfi/) is the study of saints. A hagiography, from the Greek (h)ağios (ἅγιος, "holy" or "saint") and graphē (γραφή, "writing"), refers literally to writings on the subject of such holy people, and specifically to the biographies of ecclesiastical and secular leaders. The term hagiology, the study of hagiography, is also current in English, though less common. (This, in fact, follows original Greek practice, where ἁγιογραφία refers to visual images of the saints, while their written lives (βίοι or vitæ) or the study thereof are known as ἁγιολογία.)
Christian hagiographies focus on the lives, and notably the miracles of men and women canonized by the Roman Catholic church, the Anglican Communion, the Eastern Orthodox Church and the Oriental Orthodox Church . Other religions such as Buddhism and Islam also create and maintain hagiographical texts concerning saints and other individuals believed to be imbued with the sacred.