OPUS search is the core technology in the popular Magnum Opus association discovery system. It is often considered his "magnum opus". Virchow dedicated his "magnum opus" "Die Cellularpathologie" to Goodsir. She also appeared in the ITV series "Lewis" episode "Magnum Opus". It is widely considered to be his "magnum opus". It has been described as Wurtz's magnum opus. The Pythagorean teaching of "musica universalis" is a recurring theme throughout Thoreau's "magnum opus", "Walden". In 1935, he published his magnum opus, "Black Reconstruction in America". This perfection is the accomplishment of the "magnum opus" (Latin for "Great Work"). Currently, he is working on his next magnum opus, a full length feature film, "Chanakya". Hollywood, he publicly referred to the project as "Magnum Opus". It received both critical and popular acclaim and is often cited as his "magnum opus". The concept is strongly present in Augustine of Hippo's "magnum opus" "City of God". Heidegger's magnum opus "Being and Time" was dedicated to Husserl. Sartre's definition of existentialism was based on Heidegger's magnum opus "Being and Time" (1927).