Athens is an historical anomaly. Excavations date its first settlement to over seven thousand years ago, yet it only became the capital of Greece in 1834. During the intervening centuries it was occupied by almost every mobile culture in Europe: from its earliest likely settlers, tribes from what is now Albania, to Nazi forces during the second World War, and in between by successive waves of Persians, Macedonians, Romans, Slavs, Goths, Venetians, French, Catalans, Turks, Italians, Bulgarians and the clans of various kings and tyrants of the region's early city-states. There has been a structure on its 'high city', the acropolis, since at least the bronze age, although it was subsequently altered by successive occupiers, becoming a fort, castle, temple, mosque, church and even a harem. its 'Golden Age' peaked in the fifth century BCE, with the great building projects of Pericles and Themistocles, and its later history is one of a city already nostalgic for its past, although at a time when other European cities had yet to begin constructing a past.