The Archaic period is the era of great innovations in architecture. The design of its most important buildings, the temples, becomes more complex and is subjected to austere symmetry. In the upper building the wooden parts were gradually replaced by stone and in masonry new techniques were developed. At the same time, two architectonic orders were formed, the Ionic and the Doric. The Ionic temples prevail in Eastern Greece, whereas the Doric ones prevail in main Greece and the colonies of the West. Of temple-like types are the treasuries of the Panhellenic sanctuaries, whereas there are few other building types that survive from the Archaic period, among which can be seen fountains, stoas, funeral monuments and fortifications.