it was a civilisation of about half a million population in the year 1336 which was known as Vijaynagar.
It's a belief that, Lord Rama met Hanuman and killed Vali in exchange for help from Sugreeva there. That means, Hampi has a epical history since Ramayana! WOW! In Ramayana times, this region was known as Kishkinda (Monkey Kingdom)
It has a mythical aura in it and you can feel it there. Some of the monuments are spooky though! :)
Hampi has it's own unique style of architecture. there are temples, there are masjids. Some monuments are mixture of both. I personally liked the HajaarRam Temple. The temple with 1000 sculptures of Rama on it.