Athens is one of the world's oldest cities, with its recorded history spanning over 3,400 years, and its earliest human presence beginning somewhere between the 11th and 7th millennia BC. According to Greek mythology, the city was named after Athena, the ancient Greek goddess of wisdom, but modern scholars generally agree that the goddess took her name after the city. Classical Athens was one of the most powerful city-states in ancient Greece. It was a centre for Ancient Greek democracy, the arts, education and philosophy, and was highly influential throughout the Hellenistic world and the European continent, particularly in Ancient Rome. For this reason it is often regarded as the cradle of Western civilisation and the birthplace of democracy in its own right independently from the rest of Greece.
The heritage of the Classical Era is still evident in the city, represented by ancient monuments, and works of art, the most famous of these being the Parthenon, considered a key landmark of early Western culture. Athens retains Roman, Byzantine and a smaller number of Ottoman monuments, while its historical urban core features elements of continuity through its millennia of history. Athens contains two World Heritage Sites recognised by UNESCO: the Acropolis of Athens and the medieval Daphni Monastery. Athens is home to several museums and cultural institutions, such as the National Archeological Museum, featuring the world's largest collection of ancient Greek antiquities, the Acropolis Museum, the Museum of Cycladic Art, the Benaki Museum and the Byzantine and Christian Museum. Athens was the host city of the first modern-day Olympic Games in 1896, and 108 years later it hosted the 2004 Summer Olympics, making it one of five cities to have hosted the Summer Olympics on more than one occasion.
In Ancient Greek, the city's name was Ἀθῆναι (Athênai, pronounced [atʰɛ̂ːnai̯] in Classical Attic), which is a plural word. In earlier Greek, such as Homeric Greek, the name had been current in the singular form though, as Ἀθήνη (Athḗnē). It was possibly rendered in the plural later on, like those of Θῆβαι (Thêbai) and Μυκῆναι (Μukênai). The root of the word is probably not of Greek or Indo-European origin, and is possibly a remnant of the Pre-Greek substrate of Attica.