Opus sectile

• 1. Introduction

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  Three materials made opus sectile work: marble, mother of pearl, and glass. Each was sliced into thin pieces, polished smooth, then trimmed to exact shapes before being set into floors and walls. Unlike tessellated mosaic, where thousands of tiny uniform tiles build up a picture, opus sectile used larger pieces. Each piece was shaped to define its own section of the design directly.

  The technique first appeared in Rome in the opening decades of the 1st century BC. The Romans called it sectilia pavimenta. The name opus sectile came only in later centuries, coined to describe a tradition that had already outlasted the empire that invented it. What gave this Roman craft such lasting power is where the story begins.

• 2. A Luxury of Power

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  Under Augustus, opus sectile crossed into the flooring of Rome's public buildings. The scale of the work grew more ambitious, and those early experiments at monumental size succeeded.

  The villa of Livia at Prima Porta was among the first private properties to receive the technique. The estates of Tiberius on Capri were another. Both reflect how expensive private opus sectile was: complex execution put it out of reach for all but the imperial household.

  Herod's builders in Judea adopted the technique with considerable thoroughness. The Temple Mount Sifting Project in Jerusalem has recovered polished stone triangles and squares from the Herodian Temple Mount. The pieces were numerous enough for researchers to reconstruct geometric floor patterns.

  The same geometric vocabulary appears at Herodian sites across a wide region: Cypros, Caesarea Maritima, Herodium, Jericho, Machaerus, Masada, and Banias. At Banias, the specific forms were octagons, squares, and triangles. Those first-century geometric compositions mark one end of what the technique could achieve. By the fourth century, craftsmen in Rome were pushing it toward something far more elaborate.

• 3. Chariots and Portraits

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  The Basilica of Junius Bassus in Rome produced some of the most notable fourth-century opus sectile work to survive. A large set of panels depicted an elaborate chariot and other images, showing how far beyond geometric patterns the technique had developed. Opus sectile decoration continued in Rome through the 6th century, reaching as far as Constantinople, now known as Istanbul.

  The eastern Corinthian port of Kenchreai yielded a further remarkable find in excavations carried out in the 1960s. The find was a series of fourth-century CE panels worked in glass rather than stone. They were recovered from what may have been a sanctuary of Isis. Their imagery ranged widely: portrait scenes of Homer and Plato, Nilotic landscapes, harbour-front city views, and geometric compositions. Glass required cutting and polishing methods distinct from those used for marble. Producing thin inlay sheets without fracturing the material demanded a high level of craft.

  The Kenchreai panels rank as particularly remarkable among surviving examples of ancient opus sectile. How the technique fared after Rome's political structures fragmented would depend on the regions that had already taken it up.

• 4. Beyond Rome

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  Opus sectile died out in Rome as the Empire declined. Byzantine churches kept the practice alive, applying it primarily to floor designs.

  In Persia, the technique carried a different name: Mo'araq. Three dynasties employed it extensively during the 14th and 15th centuries: the Timurids, the Qara Qoyunlu, and the Aq Qoyunlu. The technique had become sufficiently embedded in Persian visual culture to carry its own distinct local name.

  Sicily and the Italian mainland received the practice in the 12th century, through the influence of Byzantium. The form it took there was known as the Cosmatesque style, which concentrated specifically on geometric patterns. The basilica of San Miniato al Monte, which overlooks Florence, is among the Italian buildings that feature Cosmatesque work.

  The Cosmatesque arrival in the 12th century was not the last chapter. From those Italian workshops, the practice would move again into the studios of the Italian Renaissance.

• 5. From Floors to Furniture

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  The Italian Renaissance, spanning the 14th through the 17th century, revived opus sectile in the form of pietra dura. The term referred to the same fundamental practice of cutting stone and inlaying it into a surface. The Renaissance version, however, departed from ancient practice in two significant ways.

  Pietra dura compositions were considerably smaller in scale than their ancient counterparts. The primary application also shifted: rather than filling floors and walls, the technique appeared mainly on furniture. What had begun as a way of decorating public buildings had become a craft for private interiors.

  In England, the technique surfaced again in the late 19th century among artists working in the Arts and Crafts movement. Charles Hardgrave was a noted designer in this tradition. His designs were executed by James Powell and Sons at the Whitefriars Glass Works.

  Architectural work from later periods in the same tradition tends to be called intarsia rather than opus sectile. Where the history of one ends and the other begins is not a clearly drawn line.