Classical physics refers to physical ideas that actually predate newer, more comprehensive, or much more broadly applicable theories. Energy, as well as matter, have been regarded as independent concepts throughout classical physics.
Classical physics includes Newtonian mechanics, and thermodynamics, especially Maxwell's concept of electromagnetic.
The wave-like properties of tiny particles, radiation anomalous Zeeman effect tiny features across atomic spectra, as well as the photoelectric phenomenon are not accounted for in classical physics.