opus spicatum การใช้
- The masonry of the exposed enceinte, with its opus spicatum infill, was made safe, as was the top of the chapel walls.
- Only parts of the outer shell have survived; the wall being constructed of closely packed rusticated ashlars with narrow channels the remains of the infill being made of herringbone pattern bricks ( Opus spicatum ).
- The curtain walls enclosing the castle show the multiple phases of construction at Peveril, with stonework from the Norman period differentiated by the use of " opus spicatum " to modern repairs.
- In the second stage, which lasted between 535 and 600, the walls were repaired and in places built up to a height of, using the technique of stone laid slantwise ( opus spicatum ).