The Saint Mark's Church (Markuskyrkan) in Björkhagen, a district in the south of Stockholm, is a major work by Sigurd Lewerentz (1885–1975). Unlike Lewerentz's other famous church building, Saint Peter's in Klippan, there has not yet been an adequate portrait of this masterpiece of brick brutalism in book form. This gap is now filled with the present volume, which offers opulence and care: around 300 newly taken color photographs, explanatory plans, and essays by outstanding experts on Lewerentz's work make this architectural monograph a true visual delight. The focus is not only on the extraordinarily atmospheric Saint Mark's Church as a whole and its integration into the urban landscape, but also on the detailed design of flooring, furnishings, lamps, stair railings, the altar, and other liturgical elements. Additionally, questions of materiality and themes such as acoustics and atmosphere are addressed to uncover the mystery of Sigurd Lewerentz's churches.