Complex sentence: Fire broke out at the old Djurgården Theatre on May 19,1865, destroying the building just when the theatre was starting its second season, but it was rebuilt and re-inaugurated on 20 June 1867.
Split into simpler sentences: Fire broke out at the old Djurgården Theatre on May 19,1865, destroying the building just when the theatre was beginning its second season. It was rebuilt and re-inaugurated on 20 June 1867.