bracket systems called tokyō. These oversize eaves give the interior a characteristic dimness, which contributes to the temple's atmosphere. The interior of the building normally consists of a single room at the center called moya, from which sometimes depart other less important spaces, for example corridors called hisashi. Inner space divisions are fluid, and room size can be modified through the use of screens or movable paper walls. The large, single space offered by the main hall can therefore be altered according to the need. The separation between inside and outside is itself in some measure not absolute as entire walls can be removed, opening the temple to visitors. Verandas appear to be part of the building to an outsider, but part of the external world to those in the temple. Structures are therefore made to a certain extent part of their environment. The use of construction modules keeps proportions between different parts of the edifice constant, preserving its overall harmony. (On the subject of temple proportions, see also the article ken). Even in cases as that of Nikkō Tōshō-gū, where every available space is heavily decorated, ornamentation tends to follow, and therefore emphasize rather than hide, basic structures. Being shared by both sacred and profane architecture, these architectonic features made it easy converting a lay building into a temple. This happened for example at Hōryū-ji, where a noblewoman's mansion was transformed into a religious building. Buddhist architecture of the Heian Period consisted of the re-emergence of national tastes. The temple Hojoji represents paradise and the pure land which embodies elements of Pure Land Buddhism. The last formal temple was Motsuji. Muroji is a temple complex found below the mountain of Mount Muro. The area behind the temple is sacred and is off limits to visitors and pilgrims. The caves of Mount Muro are especially sacred. The famous Dragon Cave is the thought to house the Dragon King who protects the country. This is an example of how natural elements are sacred aspects of Buddhist Temples. There are four great temples of the seventh century: Asukadera, Kudara Odera, Kawaradera and Yakushiji. Four great temples of the seventh century Asuka-Dera This great hall had three golden halls and was the first full scale temple. It was the most significant temple in the Asuka period. The founder of Asukadera was Soga no Umako and he had built a smaller scaled residence similar