The gospel or good news is a theological concept in several religions. In the historical Roman imperial cult and today in Christianity, the gospel is a message about salvation by a divine figure, a savior, who has brought peace or other benefits to humankind. In Ancient Greek religion, the word designated a type of sacrifice or ritual dedication intended to thank the gods upon receiving good news. The religious concept dates back at least as far as Greece's Classical era. Roman authors are known to have adopted it toward the end of the 1st century BCE, and Christians somewhat later. It is a central message of Christianity today, in which written accounts of the life and teaching of Jesus Christ are known as Gospels. Gospel (ˈɡɒspəl) is the Old English translation of Greek εὐαγγέλιον, meaning "good news". This may be seen from analysis of (eû + ángelos + -ion diminutive suffix). The Greek term was Latinized as evangelium in the Vulgate, and translated into Latin as bona annuntiatio. In Old English, it was translated as gōdspel (gōd, "good" + spel, "news"). The Old English term was retained as gospel in Middle English Bible translations and hence remains in use also in Modern English. In Greek the term originally designated a reward or tip customarily paid to a messenger who has delivered good news. The term then came to designate the good news itself, and also a religious offering of thanks for good fortune. In Ancient Greek religion the word εὐαγγέλια means a sacrifice offered for good tidings or good news. Like other Greek religious thanks-offerings, gospel offerings took the form of animal sacrifice, offerings of food and drink, and ritual dedications. News of military victory was frequently celebrated with a gospel offering. In the play The Knights by Aristophanes of 424 BCE, the comic character Paphlagon proposes an excessive sacrifice of a hundred heifers to Athena to celebrate good news. This word in Greek has a double meaning: the singular form means a reward paid to a human messenger who brings good news, and the plural form means a thanks-offering to the gods for good news.