 Also larger businesses would have architectural policies, notably the dairy company Valio, in constructing rational high-tech factories and later, their headquarters (Helsinki, 1975–1978) by their own architect Matti K. Mäkinen, together with architect Kaarina Löfström.There was, however, a flip side to the urbanization and the expressed concern for the value of nature; traditional towns, even the old medieval ones, such as Porvoo and Rauma, were under threat of being demolished, to be replaced by straightened streets and large urban developments of prefabricated multi-storey blocks.This did indeed happen to an extent in the cities of Turku – where the wholsale redevelopment was described as the "Turku Disease" –, Helsinki and Tampere; however the latter two did not have medieval architecture at all and even Turku had lost the majority of its medieval building entities at the great fire in 1827.