Original sentence: In the 1520s Sweden emerged from the Middle Ages and once again asserted her independence under King Gustav Vasa.Notable projects from that time include the city Karlskrona, which has been declared a World Heritage Site, the Drottningholm Palace and Stockholm Palace, still the official seat of the monarchy.Older (iron age and medieval) structures also include some significant fortresses and other historical buildings such as Borgholm Castle, Eketorp fortress (both on Öland) and the Visby city wall.The king initiated a building program of grand mansions and fortresses, for reasons of defence and to express the new monarchy; much of this was continued by his sons in the later half of the century.The more imposing include the castles of Kalmar, Gripsholm and Vadstena
Edited sentence: 1930 was the year of the great Stockholm exhibition, which marked the breakthrough of Functionalism, or "funkis" as it became known.Among older structures are also some significant fortresses and other historical buildings such asat  Borgholm Castle, Halltorps Manor and Eketorp fortress on the island Öland, the Nyköping fortress and the Visby ring wall.Around 1520 Sweden was out of the Middle Ages and united under King Gustav Vasa, who immediately initiated grand mansions, castles and fortresses to be built.Notable projects from that time include the city Karlskrona, which has now also been declared a World Heritage Site and the Drottningholm Palace.Some notables projects of this kind were the Million Programme, offering affordable but anti-human living in large apartment complexes.Some of the more magnificent include the Kalmar fortress, the Gripsholm Castle and the one at Vadstena.The style came to dominate in the following decades