Every Wednesday, May through August, Copenhagen Castle Concerts (www.castleconcerts.dk) puts on free performances of classical music in the churches of historic royal residences in and around Copenhagen, including Frederiksborg and Kronborg. The concerts start at 5 p.m. May and June, 5:30 p.m. in July and 4 p.m. in August.
Contact Wonderful Copenhagen (Gammel Kongevej 1, Copenhagen V., Denmark; phone +45 3325 7400, www.visitcopenhagen.com).