Based on historical records, the type of piano music of the romantic period that requires additional virtuosic skill is the Etude.
Etude Piano Music was made popular by Frédéric Chopin in the 1830s. This type of Paino Music is composed of three sets of études with twenty-seven compositions. It is known to have two different compilations of twelve, numbered with Opus.
Etudes Paino is known and originally designed to deliver practical material for improving a specific musical skill.
Hence, in this case, it is concluded that the correct answer is Etude
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