3, 1118, the death of St. Raymond Gayrard, canon and provost of the chapter. A 15th-century life of the saint states that he took charge of the building after part of the church had been completed and that by the time of his death he had "brought the walls all the way around up to the completion of the windows..." However, the life was written much later—some three hundred years after the events it describes—and since at least three different Raymonds were involved in the building of the church, the biographer may have confused elements from the lives of all three. At any rate, whenever started, it appears that construction of the church did not progress continuously through to completion, for there is physical evidence of several interruptions in construction. The literary evidence cited above indicates that construction proceeded from east to west and, indeed, it appears that the earliest part of the exterior walls is the southern, lower part of the ambulatory and its corresponding radiating chapels. The walls in this section are built of brick and stone, with a higher proportion of stone than elsewhere in the building. As construction proceeded, it was clearly marked by an increasing proportion of brick, the characteristic building material of Toulouse. While there is basic agreement on the starting point, interpretation of the subsequent archeological evidence is subject to varying opinions. The earliest systematic examinations, after the restoration of Viollet-le-Duc, concluded that there had been three major building campaigns. More recent observations have concluded that there were four major building campaigns. The earliest section begins with the apse and includes the chevet and all of the transept below the level of the gallery, including the Porte des Comtes in the south face of the transept. The second stage is marked by the walls of the transept being completed with alternating courses of brick and stone. This change is also paralleled by a change in the style of the interior decorated capitals. This break is most evident in the transept buttresses, which change from solid stone at the bottom to bands of brick and stone at the top, a change which occurs at various levels around the transept but generally about the level of the gallery floor. There then follows another break between the eastern portion of the church – including the transept and the first few bays of the nave itself –