In this jubilee year we remember the 2000* anniversary of Jesus Christ's birth, the round anniversary of the era - of our era. Today it is widely known that the year of Christ's birth, which had been determined retrospectively in the 6* century, was not fixed correctly. Dionysius Exiguus, a scholar monk, made a mistake in the calculations. He counted the years according to the ancient Roman calendar beginning with the mythical foundation of Rome. According to him the year of Christ's birth was the year 754 after Rome's foundation which at the same time was the starting point for the...