Saint Bonaventure’s Doctrine on the Virgin Mary’s Immaculate Conception

This article seeks to shed light on the approach of Saint Bonaventure Bagnoregio (1217/21–1274) highly problematic issue Immaculate Conception Virgin Mary. In a context heated debates matter, presents long and complex set arguments that we can summarize as follows: Mary was conceived with original sin contaminating her body at first, but she cleansed it sanctified immediately after conception, very moment animation body, is, when soul gave life body. Therefore, author concludes even though Mary, like all human beings except Christ, sin, thoroughly cleansed, from first which animated by holy sin.