Hellenica (Ἑλληνικά) simply means writings on Greek (Hellenic) subjects. Several histories of fourth-century Greece, written in the mold of Thucydides or straying from it, have borne the conventional Latin title Hellenica. The surviving Hellenica is an important work of the Greek writer Xenophon and one of the principal sources for the final seven years of the Peloponnesian War not covered by Thucydides, and the war's aftermath.