In 267, the Heruli led a naval invasion of the Aegean, before landing near Sparta and plundering the Peloponnese, including not only Sparta, but also Corinth, Argos, and the sanctuary of Zeus at Olympia. They then moved north and sacked Athens, before being defeated by a local force led by the Athenian Dexippus, whose writings were a source for later historians. In the aftermath of this invasion, much of the classical and imperial monuments of Athens were spoliated to build the Post-Herulian wall, which enclosed only a small area around the Acropolis. Although a smaller city, Athens remained a centre of Greek culture and especially of Neo-Platonist pagan philosophy.