T-Centralen – Per Olof Ultvedt, Signe Persson-Melin and Anders Österlin This was the first metro station to be built in Stockholm, and was where the concept of adding artwork to the subway began. Although the original sculptures and paintings were created in the late 1950s, T-Centralen has received numerous additions. In 1975, Ultvedt added many of its most memorable features, including these blue vines and floral motifs which were intended to create a sense of soothing calm for commuters