The wooden tented church of Saviour was erected in 1700. Explorer Dmitry Laptev complained in 1741 that Zashiversk church remained the only Orthodox church from the mouth of Lena River to Anadyr. Noted preacher of Zashiversk Church, father Alexey Sleptsov, was an exile, son of former governor of Moscow Ivan Sleptsov. In 1735 was allowed to preach on condition that he will not ever leave Zashiversk. He died in 1783 at the age of 74 and his duties were assumed by his son Mikhail who lived past the age of 87.