The Themistoclean Wall is an ancient fortification built in Athens around 478 BC. Named after the Athenian statesman Themistocles, it was constructed to protect the city from potential invasions, particularly after the Persian Wars. The wall was part of a larger defensive strategy that included the Long Walls, which connected Athens to its port, Piraeus. The wall was made of large, sturdy stones and was designed to withstand attacks. It played a crucial role in the defense of Athens during various conflicts, including the Peloponnesian War. Over time, parts of the wall were dismantled, but its historical significance remains a key aspect of ancient Athenian architecture.