Starting in the ninth century, Latin-Greek debates on orthodoxy led to the flourishing of the heresiological genre of the so-called “lists of errors”. This article discusses the case of the “Greek errors” listed by Latin authors living in the Holy Land, especially those produced by Franciscan friars, who settled in Jerusalem as the exclusive representatives of the Roman Church in the fourteenth century. The article explores in detail one of the errors included in the Latin lists, namely the descent of the Holy Fire on Holy Saturday at the Church of the Holy Sepulchre.