What composer called the drama on stage deeds of music made visible?

The composer who referred to the drama on stage as "deeds of music made visible" was Richard Wagner. He emphasized the integration of music and drama in his operas, which he termed "Gesamtkunstwerk" or "total work of art." Wagner believed that the visual and musical elements should work together to create a unified artistic experience. This philosophy significantly influenced the development of modern Opera and theatrical productions.