The theme of the Festschrift to Carsten Bach-Nielsen in Aarhus is den sete kirke, i. e. “the seen church”. The theme derives its meaning from the fact that the Church is not just an abstraction or an invisible community, but also something that is incarnated, as it were, in the world. From the various articles in the volume, I have derived four themes concerning this “seen” Church. First, the “seen Church” always takes different material forms. The physical materials, such as church buildings, have according to the “material turn” the ability to transform us. During the Enlightenment and Pietism, the material forms of the physical church were often regarded as something negative. The “outward” forms were even considered dangerous whereas tr...