Frederiksborg Palace or Frederiksborg Castle (Danish: Frederiksborg Slot) is a palace in Hillerød, Denmark. It was built as a royal residence for King Christian IV and is now a museum of national history. The current edifice replaced a previous castle erected by Frederick II and is the largest Renaissance palace in Scandinavia. The palace is located on three small islands in the middle of Palace Lake (Slotsøen) and is adjoined by a large formal garden in the Baroque style.