Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Wagner tuba is a comparatively rare brass instrument that combines elements of both the horn and the tuba. It was originally created for Richard Wagner''s operatic cycle Der Ring des Nibelungen. Since then, other composers have written for it, most notably Anton Bruckner, in whose Symphony No. 7 a quartet of them is first heard in the slow movement in memory of Wagner. The euphonium is sometimes used as a substitute when a Wagner tuba cannot be obtained. Wagner was inspired to invent this instrument after a brief visit to Paris in 1853, when he visited the shop of Adolphe Sax, the inventor of the saxophone.