As the development of the plays called for an increasing number of actors, the clergy had to call upon the laity for help, so that the acting fell more and more into the hands of the latter, until finally the whole work of presenting the plays was taken over, in most cases, by the guilds, organizations of the various trades which corresponded roughly to our modern trades unions. Each guild had its own play of which it bore the expense and for which it furnished the actors. Thus the shipwrights would present _The Building of the Ark_, the goldsmiths, _The Adoration of the Wise Men_. Sometimes the plays would be presented on a number of tiny stages or scaffolds grouped in a rectangle or a circle; more often they were acted on floats, called pageants, which were dragged through the streets and stopped for performances at several of the larger squares. These pageants were usually of two stories, the lower used for a dressing-room, the upper for a stage. The localities represented were indicated in various ways--Heaven, for instance, by a beautiful {26} pavilion; Hell, by the mouth of a huge dragon. The costumes of the actors were often elaborate and costly, and there was some attempt at imitating reality, such as putting the devils into costumes of yellow and black, which typified the flames and darkness of Hell. Fairly complete cycles were in existence as early as 1300; they reached the height of their perfection and popularity in the later fourteenth and in the fifteenth centuries; and they began to decline in the sixteenth century. After 1550 the performances became more and more irregular, until, at the accession of King James I, they had practically ceased.