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.

[3] Curiosum was recorded in May 1981 at Hamet Hof in Vienna, Austria and released later that year.

Stewart Mason, in his review for Allmusic, writes that Cluster "...had started taking cues from the groups they'd initially inspired.

A 1,000 copy limited edition digitally remastered CD of Curiosum was released on the Japanese Captain Trip Records label on September 20, 2007.