  The temperature dependence of the chiral condensate in isospin-symmetric
nuclear matter at varying baryon densities is investigated starting from a
realistic free energy density of the correlated nuclear many-body system. The
framework is thermal in-medium chiral effective field theory which permits a
systematic calculation of the quark mass dependence of the free energy density.
One- and two-pion exchange processes, virtual $\Delta(1232)$-isobar excitations
and Pauli blocking corrections are treated up to and including three-loop
order. It is found that nuclear matter remains in the Nambu-Goldstone phase
with spontaneously broken chiral symmetry at least in the range of temperatures
$T\lesssim 100\,$MeV and baryon densities up to about twice the density of
normal nuclear matter.
