Linköping is a city in southern Sweden, the seat of Linköping Municipality. Linkoping has a population of 95,000 people. Linköping is the center of an old cultural region and celebrated its 700th anniversary in 1987. Dominating the city's skyline from a far distance is the tower of the cathedral. There is also a minor airport. Linköping is the home of the multi-purpose Östergötland County Museum and of the Linköping Symphony Orchestra. The city is one of the sites of the Ostrogothia Music Days each summer, and the host of the Student Orchestra Festival in May every other year. When the area around the main square was re-planned in the 1960s and many old houses were destroyed, some of them were moved to Gamla Linköping just outside the central parts of the city, now a living museum environment and a popular site for both residents and tourists to visit.