In the third and fourth bays there was formerly a square =Labyrinth=, flanked at the corners by polygonal compartments. In the interior, a line of white tiles bordered with black stones ran from one side, and after complicated windings reached a central compartment. At the corners of the compartments were figures of the four first architects of the Cathedral: Jean d'Orbais, Jean le Loup, Gaucher of Rheims and Bernard of Soissons. The central figure is probably that of Archbishop Aubri de Humbert, who laid the first stone of the edifice. This Labyrinth, the drawings of which revealed the names of the builders of the Cathedral, was destroyed in 1778 by the Chapter, to prevent the children playing there. [Illustration: ROOF OF THE NAVE IN 1919 _In the foreground, on the right: Corner of the Southern Transept._] Between the Labyrinth and the Choir are about twenty 14th century tombstones. The =great pulpit= set up against the fifth left-hand pillar was made, in the time of Louis XV., by a Rheims artist (Blondel). It comes from the old church of St. Pierre-le-Vieil. In the sixth bay, just before the entrance to the choir, the spot where St. Nicaise was beheaded, on the threshold of his church, was formerly indicated by a small circular chapel known as _La Rouelle de St. Nicaise_. The tiny building was replaced by a memorial inscription on the flagstone, supposed to have been stained with the blood of the martyr. =The Aisles of the Naves= The windows of the Aisles are similar to the lofty windows of the nave. The walls were formerly hung with valuable tapestries, which were taken down and evacuated by the _Historical Monuments Department_ at the outbreak of the War. The two oldest, dating back to about 1440, and known as the tapestries of the _fort roi Clovis_, were presented by Cardinal Charles de Lorraine, and depict the history of Clovis. Those of the Renaissance, given in 1530 by Archbishop Robert de Lenoncourt, who caused himself to be portrayed kneeling in the picture of the Birth of Christ, depict the _Life of the Virgin_. The most modern, presented in 1640 by Archbishop Henri de Lorraine and worked by the Fleming, Daniel Pepersack, represent Jesus at the _Marriage at Cana in Galilee_ and _Jesus among the Doctors_. At the foot of the walls, three stone steps serve as seats. [Illustration: TAPESTRIES IN THE SOUTHERN SIDE AISLE, BEFORE THE WAR] =The Interior of the Northern Transept= (_See plan, p. 33, and the Exterior, p. 42._) The inner façade is partially hidden by the great organ, built about 1487 and transformed several times since then. Of the original organ the loft only remains, the Gothic balustrading of which is pierced with Flamboyant arcading. [Illustration: THE NORTHERN TRANSEPT _(see p. 33)_]