Univers Zéro (also written Univers Zero and sometimes Univers-Zero; official sources have not been consistent on this) is a Belgian instrumental progressive band known for playing dark music heavily influenced by 20th century chamber music. The band was formed in 1973 by drummer Daniel Denis and trumpeter Claude Deron under the name Necronomicon (after a fictitious book first referenced in H. P. Lovecraft's horror stories) before being renamed to Univers Zero in 1974.