 In 1826, it was the site for the first Norwegian Constitution Day parade.During the late 19th century the area started being redeveloped into dense labour-class housing, with a school opening in 1877.Ilen Church ("Ila kirke") was opened in 1889 and in 1893 Ilalinjen, a horsecar line, was built with Ila Station as the terminus and rebuilt to a tramway in 1901.