Opus reticulatum
（重定向自Reticulated Work）
![Opus reticulatum used on the exterior wall of Hadrian's Villa, which was used as a retreat for the Roman Emperor Hadrian in the early 2nd century.](/Images/godic/202502/07/Opus_Reticulatum_14141.jpg")
![Opus reticulatum in Pompeii](/Images/godic/202502/07/Opus_Reticulatum_Pompeii4141.jpg")
Opus reticulatum (also known as reticulated work) is a form of brickwork used in ancient Roman architecture. It consists of diamond-shaped bricks of tuff, referred to as cubilia, placed around a core of opus caementicium.