When did the 'classical period' begin and what happened during that time?

"The Classical Period produced remarkable cultural and scientific achievements. The city of Athens introduced to the world a direct Democracy the likes of which had never been seen hitherto, or subsequently, with western governments like Great Britain, France, and USA emulating it a thousand years later"

there is not really a certain expensive film type but i believe all of them cost mostly the same price, i hope this a little bit

i think these large heads represent their gods and i do think they were worshiped by the people. if there was only one head and no heads around it i think it would be monotheistic but if there are several heads close to each other it could be polytheistic.