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This
image from John Speed's map of Yorkshire, England shows the walled
city of York, the site of the brilliant annual spectacle known to its medieval
performers and spectators as the "Corpus Christi Play."
The Corpus Christi Play was an annual outdoor event, involving hundreds of actors; it was already a long-established tradition by the end of the 14th century, and continued until suppressed by the Protestant Reformation in the late 16th century.
Dozens of short plays, each mounted on a wagon-stage,
began at the Trinity Priory (lower left) and moved through the city streets,
stopping at pre-arranged performance locations known as stations (indicated
by the large dots on the map above).
PSim (Pageant Simulator), a teaching aid and research tool, is computer software that models the motion of pageant wagons during a simulated York Corpus Christi Pageant. Dots representing individual wagon-mounted plays move from station to station on a color map of the city, while the computer displays elapsed time. PSim comes with several default data sets that illustrate elements of different production theories, as developed by some of the modern scholars who have tried to reconstruct the medieval performance. The program was originally written for Windows 3.x, but a Java version of PSim is now available via the internet-- although it may load very slowly on some systems. I suggest that you first visit the PSim screen shots, which cover in detail what PSim does.
The program can be used to demonstrate, for instance, the effect of varying the number of performance stations, or the cumulative effect of backups and gaps during the performance. A more ambitious PSim user (Windows 3.x version only, at present) can create custom configurations, by specifying such data as which plays participate in the cycle, the performance length of each individual play, the location of stations, and the travel times between them.
Special thanks are due to Alexandra F. Johnston and the staff at the Records of Early English Drama, for introducing this student of 20th-century American literature to the York plays; and to Allen Forsyth, Ian Graham, John Bradley, and Rudy Ziegler of the University of Toronto Information Commons, for technical and moral support.