is Aalborg's most ambitious construction project in recent years. The city also has a wide selection of galleries and arts and crafts outlets operated by local artists. The Academy of Music also has a presence in Aarhus. There are several glass workshops; others produce jewelry, sculptures or exhibit paintings. Museums There are various museums in the city. The Aalborg Historical Museum was established in 1863, making it one of the earliest provincial museums in the country. The North Jutland Historical Museum conducted a series of archaeological excavations in the 1950s at Lindholm Høje, revealing ancient burial sites. In 1992, the Lindholm Høje Museum was opened there and extended in 2008. In 1994 and 1995, excavations at the site of the Greyfriars Monastery resulted in the creation of the underground Gråbrødrekloster Museum in the city centre. Several organisations now collaborate under the leadership of the North Jutland Historical Museum. The Springeren - Marine Experience Center is a marine museum on the city's wharf with a wide range of exhibits including "Springeren", an old Danish submarine, whence its name. The Aalborg Defence and Garrison Museum documents Danish defences during the Second World War as well as the history of Aaborg's garrison since 1779. The KUNSTEN Museum of Modern Art Aalborg was built from 1958 to 1972; the collection consists of around 1,500 art objects, including paintings, sculptures and other media. Music The Aalborg Symphony Orchestra () founded in 1943 presents about 150 concerts a year, frequently playing in the Musikkens Hus. It also plays for the Jutland opera company (, also based in Aalborg), and at the Royal Danish Theatre in Copenhagen. It is one of the main organisers of the 10-day Aalborg Opera Festival held every March. Aalborg has the jazz club Jazzclub Satchmo and an annual jazz and blues festival (), also known as the Mini New Orleans Festival. Over four days in mid-August, concerts are performed on squares, in the streets, and in cafés and restaurants. Since 2012, the Egholm Festival, a small music festival on the island of Egholm near Aalborg has been organized in the first weekend of August. It features relatively unknown upcoming pop, rock and hip-hop artists. The festival has two stage areas and was organized by the Musical Association Aalborg (MUSAM) and Aalborg Events. Religion Lutheranism The principal religion in Aalborg as in the rest of Denmark is Christianity. Aalborg is the seat of