What is opus quadratum?

Opus quadratum is a building technique used in ancient Roman and Greek architecture. It involves the use of square blocks of stone or brick, which are laid in even rows to create a flat surface. This technique was commonly used in the construction of walls, foundations, and floors of public buildings such as temples, amphitheaters, and basilicas.

The blocks used in opus quadratum are typically large and heavy, and were cut to precise dimensions using a ruler and hammer. The corners of the blocks are usually slightly curved to prevent them from chipping or breaking under pressure.

Opus quadratum was a popular building technique in Ancient Roman architecture and was used for the building of many famous structures such as the Colosseum and the Roman Forum. The technique was also used in the construction of many important Greek buildings like the Parthenon in Athens.