connects to the bell stair beyond. Taylor & Taylor believed it was the original west door to the church and that the lowest stage of the tower was at that time a porch. A second stage was added during the second phase of Anglo-Saxon building to form a tower and the bell stair also added at that time. The corners of the west tower have superb examples of “long and short work”.
A two bay north aisle was added in the late twelfth century with Transitional style round arches and with simple decorated capitals typical of the period. Above it there are still vestiges of an Anglo-Saxon window that was rendered redundant by the work. At the same time an arch was built linking the west end of this aisle to the base of the tower. This Norman arch also still survives. In the thirteenth century the chancel was enlarged to its present dimensions and a north chapel was built alongside it, thus extending the aisle to three bays.
The three-bay south aisle was added in the fourteenth century as was the east window. At the same time the easternmost bay of the north aisle was reconstructed to match the pattern of the south aisle bays. The nave walls were raised to allow for the addition of a clerestory. The height of the vestigial Anglo-Saxon window above the north arcade shows that not too much additional wall was needed: and this is exactly what we would expect given the Anglo-Saxon love of high nave walls. The belfry stage of the west tower probably also dates from this period.
The fifteenth century saw the aisles extended north and south and, of course, the windows replaced in the perpendicular style. The impressively tall chancel arch was built at this time and you can clearly see how it was set within the original arch, the date of which is unclear. The north chapel was reconstructed and the south chancel chapel added. A south porch if two storeys was added in about 1500. The church we see now is large and surprisingly complex.
All in all, Brigstock is something of a surprise architecturally. It is not well-known but is an important part of the "story" of Northamptonshire Anglo-Saxon churches and deserves recognition alongside the better-known Brixworth and Earls Barton.