Frederiksborg, a royal palace built by Christian IV. of Denmark in 1606-20, after a plan by Inigo Jones, near the town of Hille-rod, on the island of Seeland, 22 m. N. N. W. of Copenhagen. It is a Gothic castle of red brick, covering three small islands in a little lake. The Riddersal, or knight's hall, has a ceiling elaborately decorated with carvings, gildings, and paintings, on which 26 artists are said to have worked for seven years. It has also a collection of portraits, and a richly ornamented chapel, in which all the late kings of Denmark have been crowned. The pulpit and altar in the last are of ebony and silver, exquisitely wrought, and containing more than 600 lbs. of the precious metal.