Christiansborg Palace, located on the tiny island of Slotsholmen, contains the Danish Parliament Folketinget, the Supreme Court, and the Ministry of State.
Parts of the palace are used by the Royal Family for various functions and events. The Royal Reception Rooms include The Tower Room and The Oval Throne Room where foreign ambassadors to Denmark are received by the Queen. The Throne Room gives access to the balcony where the Danish monarchs are proclaimed.
https://www.visitcopenhagen.com/copenhagen/christiansborg-palace-gdk420896