This study focuses on an Old Believers’ skete near the village of Maltsevo, Fort Chaus, north of modern Novosibirsk, where, according to mid-18th century documents, community members committed self-immolation. Documents differ as to where the rite occurred, how many people died, and how the skete was built. As compared to other contemporaneous sketes in Russia, this one is described in more detail. To all appearances, its construction resembled that of other Siberian forts. Similarities include an outer palisade wall, up to 2.45 m high, and the use of the logwork of houses as towers. The reason behind those parallels may be that preachers and community members were familiar with the fortifi cations of Fort Chaus. Fortifi ed Old Believers’ sketes are known in the Upper Ob region. The estimated living space of the log cabins fully corresponds to written data about the number of persons who took refuge in the skete. The search for the actual remains of the skete is ongoing and should be continued because this architectural structure, which existed for no more than one and a half months before the fi re (May–June 1756), is a unique site of the late 18th century.