 In 2013, Ratnadeep exhibited at the prestigious Deutsche Oper Berlin a series of works titled 'The Golden Ear- A Tribute to Wagner', based on German Composer Richard Wagner and mainly his epic opera "Der Ring des Nibelungen" (Ring of Nibelungs).The work revolves around Ratnadeep's philosophical interpretation with connection to especially to Indo-Global mythological context with contemporary times.He has participated in many group exhibitions like 'Sarang', Seoul, Korea; Pictures of Asia, Larasati, Singapore; 'Indian contemporary art', Chelsea College of Arts, UK; Uneo Royal Museum, Japan; Ao~rta Project, BBK Kunst Forum, Düsseldorf and Ausstellungshalle Innenhafen, Duisburg, Germany.