A person who advocates for or practices classicism or classical principles in art, literature, or philosophy.
From 'classical' + '-ist' (a person who practices or advocates). The '-ist' suffix creates an agent noun for someone devoted to a cause or style.
A classicalist might spend their whole career arguing that nothing in modern art compares to ancient Greece—they're the gatekeepers of tradition, and while sometimes rigid, they've preserved incredible knowledge about how to do things the 'right way' according to centuries of practice.
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