HAVING quickened the appetite with a tout of the lesser churches of the transition period, the loiterer should now feel primed for the full enjoyment of the most perfect specimen of the epoch, in which one can best trace the actual passing from Roman to Gothic. This is the sabbatical church of Saint Martin of the Fields. Of all the ancient religious establishments of Paris, this old priory retains best its monastic aspect. Instead of the general destruction which was the fate of most of these old monasteries at the time of the Revolution, when their orders were suppressed, Saint-Martin was passed intact first to a manufacturer of arms, then, in 1798, to the installation of the then newly founded Conservatoire des Arts et Metiers, still within its protecting enclosure.