The instalment (October 2006) of a polychrome ceiling of the main nave of the wooden church in Boguszyce marked the completion of nine years of conservation, conducted with intervals and encompassing the whole painted decoration of the ceiling and complex, multistage repair of the church architecture. Apart from the considerable range of technical work, consisting in a transfer onto a new base of about 30% of boards covered with painted decorations, the fundamental conservation problem was cleaning the polychrome surface as well as removing the polyvinyl acetate and pigment retouching, which had changed the original colour. Another difficult and complex task involved a reconstruction of a considerable part of the painted decoration, connected with a recomposition of the improperly arranged segments of the main and northern nave. These undertakings were preceded by in-depth iconographic and stylistic studies, whose purpose was to establish the original form of the depictions. The prolonged realisation made it possible to assess the effectiveness of the performed work. No new flaking or loosening of the polychrome was noticed; the same holds true for colour retouching and reconstruction. The realisation of the repair-conservation meant that the building in question regained its construction stability and the danger of its collapse was averted. The process of covering the church roof with steam-permeable foil and double shingles as well as building a floor in the attic should protect the valuable polychrome ceiling from damage. The conservation was supervised by Maria Lubryczyńska and carried out by Krystyna Sommer, Joanna Czernichowska, Marcin Kozarzewski, Małgorzata Pałka-Ślusarczyk, Małgorzata Oborska, Barbara Kaniewska, Elżbieta Jeżewska, Katarzyna Lesiakowska, Małgorzata Ujma, Magdalena Muc and the author of this article. Transfers and repair of the underpaintings were performed by Jacek Cypel, M, A.