Glossary · O
Opus quadratum
Roman walling of squared stone blocks in regular courses, often of tufa blocks two Roman feet high laid alternately as headers and stretchers.
Where it appears in the book
In the chapters Walls and Openings.
Nearby in the glossary
Optical refinements · Opus caementicium · Opus incertum · Opus mixtum · Opus reticulatum · Opus testaceum · Orangery · Orchestra