You mean bass clef? Anyways, it shows notes that are lower in pitch
I believe the correct answer is: Neoclassicism.
Even before 1789, French popular taste had begun to turn
away from lighthearted subjects of rococo and as revolution neared artists
increasingly sought noble themes of public virtue and personal sacrifice from
the history of ancient Greece or Rome. This marked the birth of Neoclassicism,
a movement which valued restraint and discipline, using the austere clarity of
the neoclassical style to stamp their subjects with certitude and moral truth.
