Sunday (Sax. Sunnan doeg), the first day of the week, identical with the Roman dies Solis (day of the sun). The keeping of this as a sacred day, in memory of Christ's resurrection and of the descent of the Holy Ghost, dates from the beginning of Christianity. It is probable that the first Jewish Christians kept this day holy, while conforming also to their legal sabbath. It was called the Lord's day in all the churches; but it was also popularly designated as Sunday as soon as the gentile element began to prevail. According to De' Rossi, the first monumental inscription calling it the Lord's day is of the year 403. Its first official recognition is in an edict of Constantine in 321, ordering that all work should cease in the cities "on the venerable Sunday," but permitting necessary husbandry to be attended to. The Theodosian code prescribed that "on the Sunday, rightfully designated by our ancestors as the Lord's day, all lawsuits and public business shall cease." (See Lord's Day).