King’s Lynn Minster had to be reconstructed when there was a little incident in 1741 when part of it collapsed. The structure was rebuilt internally by Matthew Brettingham and the supporting columns of the church were reconstructed. The original larger column footprint is still visible, showing how substantial the foundations originally were, although since the building collapsed I wonder about the quality of the original civil engineering team….
Anyway, as I understand, Brettingham changed the floor level by making it a little higher, which was later undone in the mid-nineteenth century during another reconstruction. This meant that the original floor level was restored, making these foundations visible once again. And, this looks better to me, it tells a clearer story about the architectural history of the church.