These two small and exquisite churches by Tadao Ando - one rural and 'open', the other urban and 'enclosed' - complement each other perfectly and together provide an insight into Ando's creation of sacred space. The Church on the Water occupies an idyllic pastoral site and consists of two squares, one large, one small, that overlap and are arranged facing a man-made pool. The Church of the Light is built in a quiet residential area of Osaka. Here Ando explores the spiritual force of the effects of sunlight on raw concrete. Slits cut in the form of a cross perforate the chapel's front wall; when lit up by the morning sun they create what Ando describes as a 'cross of light'. With these two churches, Ando provides a synthesis of opposites, creating spaces that attain a purity and calm through powerful architectonic forms.