Which opus type uses rectangular blocks in the facing?

Which opus type uses rectangular blocks in the facing?

• A. Opus Quadratum
• B. Opus Recticulatum
• C. Opus Incertum
• D. Opus Mixtum

Answer: (A)

In this type of wall construction, the look of the facing is defined by large, regularly cut rectangular stones laid in horizontal courses. Opus quadratum uses these big rectangular blocks, squared on several faces, stacked in neat layers to create a smooth, orderly exterior with joints that run in straight lines both vertically and horizontally. This gives a monumental, ashlar-like appearance. That contrasts with Opus recticulatum, which shows a grid-like pattern of many small square blocks forming a reticulated surface; Opus incertum, which presents a rough, irregular rubble surface with little to no regular shaping; and Opus mixtum, which blends different techniques and materials in alternating bands, without a single uniform facing of large rectangles.

In this type of wall construction, the look of the facing is defined by large, regularly cut rectangular stones laid in horizontal courses. Opus quadratum uses these big rectangular blocks, squared on several faces, stacked in neat layers to create a smooth, orderly exterior with joints that run in straight lines both vertically and horizontally. This gives a monumental, ashlar-like appearance.

That contrasts with Opus recticulatum, which shows a grid-like pattern of many small square blocks forming a reticulated surface; Opus incertum, which presents a rough, irregular rubble surface with little to no regular shaping; and Opus mixtum, which blends different techniques and materials in alternating bands, without a single uniform facing of large rectangles.