Opus spicatum: brick laid in a herringbone pattern.

Opus spicatum, literally "spiked work," is a type of masonry construction used in Roman and medieval times.

Of the temple we can still see today Roman flooring in a herringbone pattern or Opus spicatum.

The church has a very early Norman nave and herringbone opus spicatum masonry is still visible on the outside of the north wall.

The inner and outer shell is made of horizontal layers of brick, whilst the core is lined with cut stone laid in a herringbone pattern (opus spicatum).

In 1980-81 excavations uncovered walls in opus incertum, columns, anfora, herringbone floors in opus spicatum and seven dolium (large earthenware containers) which would be typical of a country villa.

The curtain walls enclosing the castle bear testament to the multiple phases of construction at Peveril, with stonework from the Norman period - differentiated by the use of opus spicatum - to modern repairs.

The flints in the south wall are laid in a herringbone (opus spicatum) pattern, a style favoured during the Saxon period; the church has been identified by some sources as one of the best surviving examples of herringboning from that era.

It features a 12th-century north wall and window of Norman date, fine surviving examples of opus spicatum or herringbone masonry, a medieval rood screen, Elizabethan era table and dug out chest, Jacobean era pulpit and brasses and other points of interest.