Kizhi Pogost () is a historical site dating from the 17th century on Kizhi island. The island is located on Lake Onega in the Republic of Karelia (Medvezhyegorsky District), Russia. The pogost is the area inside a fence which includes two large wooden churches (the 22-dome Transfiguration Church and the 9-dome Intercession Church) and a bell-tower. The pogost is famous for its beauty and longevity, despite being built exclusively of wood. In 1990, it was included in the UNESCO list of World Heritage sites and in 1993 listed as a Russian Cultural Heritage site. General information The pogost was built on the southern part of Kizhi island, on a hill 4 meters above the Lake Onega level. Its major basic structural unit is a round log of Scots Pine (Pinus sylvestris) about 30 cm in diameter and 3 to 5 meters long. The Kizhi Pogost was built without using a single nail. Many thousands of logs were brought for construction from the mainland, a complex logistical task in that time. The Church of the Transfiguration The Church of the Transfiguration () is the most remarkable part of the pogost. It is not heated and is, therefore, called a summer church and does not hold winter services. Its altar was laid June 6, 1714, as inscribed on the cross located inside the church. This church was built on the site of the old one which was burnt by lightning. The builders' names are unknown. A legend tells that the main builder used one axe for the whole construction, which he threw into the lake upon completion with the words "there was not and will be not another one to match it". The church has 22 domes and with a height of 37 meters is one of the tallest wooden buildings in Northern Europe. Its perimeter is 20×29 meters. It is considered that the 18-dome church on the southern shore of Lake Onega — built in 1708 and destroyed by fire in 1963 – was its forerunner. According to the Russian carpentry traditions of that time, the Transfiguration Church was built of wood only with no nails apart from the domes and roof shingles. There are approximately 180,000 nails securing the 60,000 roof shingles. All structures were made of scribe-fitted horizontal logs, with interlocking corner joinery — either round notch or dovetail — cut by axes. The basis of the structure is