The entertainments most commonly added to the religious ceremonies at the festivals were, in the first place, those of a musical character, partly vocal, partly instrumental, or a combination of both; in the second, dances, both choric and pantomimic, lastly scenic representations, gymnastic contests, processions, national games, etc. Among these the musical, choregraphic, scenic, and gymnastic representations were first raised to the dignity of regular competitions. Of course, different festivals were celebrated in different ways; apart from local differences, the very character of the divinity in whose honour the festival was held, and the different phases of the legend, necessitated differences in the mode of celebration and in the regulation of those who were to take part in them; thus some festivals were celebrated by both sexes together, and others by only one, to the exclusion of the other. In one point, especially, the Hellenic differed from our modern Christian festivals. It is a natural consequence of the Christian religion that the great festivals are celebrated at the same time by all believers in all parts of the civilised world, while the Greek religion knew of no such religious festivals common to all Hellenic tribes. There were a number of national festivals which were of equal importance to all Greeks; but these were not celebrated simultaneously throughout the country, but only at one specially appointed place, to which spectators came from all parts, and which thus provided an opportunity for great national meetings recurring at regular intervals. In consequence of the decentralisation of the country, these provided the only means of awakening and maintaining national feeling among the Greeks. Other festivals were peculiar to particular countries, or even to towns or communities; the differences existing in Greek belief, which are often closely connected with national traditions and racial peculiarities, were also marked in the act of worship. Even those regular festivals which were celebrated alike in most of the Greek states were not all held on the same day, but at different times, which was probably due to the fact that Greek antiquity was acquainted with no common calendar. The proceedings at these festivals also differed greatly according to the place. We know very little about the majority; most details have come down to us concerning the Attic calendar and the customs in use there, though even here our knowledge is very incomplete. The great Hellenic national festivals, which were celebrated at Olympia, Delphi, Nemea, and on the isthmus of Corinth, will first claim our attention.