St Hallvard Abbey in Oslo is a unique place of worship. Its architecture is conceptually rigorous and yet it is emotionally affective, touching profoundly the mind and feelings of a believer and a visitor. Its strong, but silent and unpretentious bodily and material presence, overseeing the Oslo fjord from a cliff site, in between three tall housing blocks from the 1950s in the Enerhaugen neighbourhood in Oslo, radiates a sense of mystery.