Александр I(105-115 or 109-119, fifth Pope after St. Peter and successor to St. Evaristus. His 10-year rule is attested by Pope St. Eusebius, 309-310); Александр II(Pope from 1061 to 1073 who worked for the abolition of simony, the enforcement of clerical celibacy, and laid the foundations of a reform movement); Александр IV(Pope from 1254 to 1261 who worked for reunion between eastern Christians and Rome, and attempted in vain to organize a crusade against the Tatars); антипапа Александр(V) (Antipope from 1409 to 1410 allegedly poisoned by his successor, the antipope John XXIII; V); Александр VII(Pope from 1655 to 1667 whose pontificate was marked by several disputes); Александр VIII(Pope from 1689 to 1691 who maintained the condemnation of the Gallican Articles of 1682, which restricted papal authority, and opposed Jansenism); Александр VI Борджиа(Corrupt, worldly, and ambitious Pope from 1492 to 1503, whose neglect of the spiritual inheritance of the church contributed to the development of the Protestant Reformation); Александр III(Pope from 1159 to 1181, not merely one of the abler medieval Popes but also one who won greater prestige for his office by his conduct)