The museum of Northern Ostrobothnia was established in 1896. The basic exhibition will tell you the history of the city of Oulu and its surroundings. Between the years 1911-1929 the museum operated in an old wooden villa Villa Ainola, which was destroyed in a fire on July 9th, 1929. Some of the collections of the museum were also destroyed. Soon after the fire the current museum building was started to be built on the site of the old villa. The new stone house was completed in 1931. The building was designed by a Finnish architect Oiva Kallio.
The basic exhibition extends in the all other floors of the building except the bottom floor, which is dedicated to the changing exhibitions and an exhibition for the children. The exhibition for the children is which is based on the Doghill books by Finnish children's author Mauri Kunnas. The ground floor hosts a large scale model of Oulu city centre in the year 1938 before the bombings of the World War II.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.