A part of the west wall of a chapel, which formerly existed to the north of the tower, is indicated by the jamb and springing of a window. A sketch section of its mouldings is given in Fig. 640, as also a section of the mouldings of the door to the turret, which entered from this chapel. These mouldings are evidently not earlier than late fourteenth century work. There are two seventeenth century burial vaults adjoining the north transept. In the larger of these is the fine monument to Sir Robert Bruce of Carnock, illustrated in _The Castellated and Domestic Architecture of Scotland_, Vol. V. p. 207. [Illustration: FIG. 640.--Culross Abbey. Sections of Mouldings of Chapel Window and Turret Door.] Adjoining the south transept on the south is the sacristy, now converted into a vestry, and hardly to be recognised as old, owing to alterations. The shape and position of this apartment clearly indicate its original use; it had the usual east window, now built up, and has otherwise been altered. To the south of the sacristy was the chapter house, which also occupied its normal position. Just enough remains to enable it to be identified, viz., the northmost of the usual three west openings to the cloister (Fig. 641), with the jamb and springing of the central opening, or as much of it as can be seen for the modern walls that are built up against it. This fragment, even in its mutilated state, is a fine example of first pointed work. The inner order of the arch mouldings has fallen away, and otherwise the work has been greatly destroyed, its beauty not having been appreciated. The shafts and arch mouldings (Fig. 642) are all of very bold and pure design. The caps and bases are rounded, and the hood mould, which was also a string course, is ornamented with the dog-tooth. The chapter house had two rows of columns, as is evident from the remains of the springing of the first arch from between the two existing openings as shown in Fig. 641 and the Plan (Fig. 642). It was usual for the two side openings to be unglazed windows rather than doors, but [Illustration: FIG. 641.--Culross Abbey. Opening to Chapter House.] Mr. Sharp, in his paper on “The Architecture of the Cistercians,”[85] points out that it was common for the three openings to be doorways, with the peculiarity seen here that they were not intended to have doors. [Illustration: FIG. 642.--Culross Abbey. Door to Chapter House.] [Illustration: FIG. 643.--Culross Abbey. Entrance to West Side of Cloister.]