Curiosum is the ninth album by the electronic music outfit Cluster. It was also the final collaboration between Dieter Moebius and Hans-Joachim Roedelius before an eight-year hiatus.Curiosum was recorded in May, 1981 at Hamet Hof in Vienna, Austria and released later that year. The album was Cluster's last release for Sky. It lives up to its name, with the seven relatively short tracks of offbeat and unusual melodies.