sentences:  In the 1950s and 1960s, Norberg-Schulz practiced as an architect both alone and in collaboration with Arne Korsmo, with whom he co-designed the famous row houses at Planetveien Street in Oslo, where both of them lived with their respective families.Norberg-Schulz became progressively disillusioned with practice, just as his first book, "Intentions in Architecture", started to earn him international acclaim as an architectural theorist.His later theoretical work of the 1970s and 1980s moved from the analytical and psychological concerns of his earlier writings to the phenomenology of place, and he was one of the first architectural theorists to bring Martin Heidegger to the field.