Roman Wall, Using irregular shaped and ramdom placed uncut stones or fist-sized tufa blocks inserted in a core of OPUS CAEMENTICIUM, used from the beginning of the 2nd Cent. bc, later superceded by OPUS (Quasi) RETICULATUM. Also see OPUS VITTATUM and OPUS INCERTUM, OPUS QUADRATUM, OPUS RETICULATUM, OPUS TESTACEUM, OPUS LATERICIUM, OPUS MIXTUM, OPUS RETILATUM. Roman or Romans may refer to: A thing or person of or from the city of Rome. ... For the prefix, see wikt:quasi-. Quasi is an indie rock band formed in Portland, Oregon in 1993, consisting of the ex-husband and wife team of Sam Coomes (vocals, guitar, roxichord, various keyboards) and Janet Weiss (drummer for the now-disbanded band Sleater-Kinney) on vocals and drums. ... Opus quadratum is an ancient Roman construction technique, consisting of squared blocks of stone in parallel lines of the same height. ...