A second notable work by the company is located in the Frederiksborg Palace Chapel in Hillerød, Denmark. After a fire burned down the old organ in 1859, Marcussen began work on a new one. The organ was completed in 1864 and consisted of 25 stops distributed over Hovedværk (Great Organ) Præluderværk (a division for chorale preludes), and a Pedal. The organ had a traditional classic action and was designed for the playing of early romantic music. The organ was supplied wind by six box bellows. In 1994-97, the organ was enlarged by Th. Frobenius & Sons, whose founder had met A.C. Zachariassen during his visit to Denmark. The changes to the organ paved the way for even more massive alterations, which were carried out by P.G. Andersen. The chapel had called for a larger organ to allow for more concerts. In 1972, the Marcussen organ was pushed to the back of the facade to make way for a new instrument. Fortunately, in 2002, the old organ was completely restored and recreated by Marcussen. The original Marcussen organ was not able to be moved from behind the Andersen organ. Because of this, the old wind system, containing 6 box bellows, was not able to be reinstated. The stop action and action on the Hovedværk remains the same from 1864. However, the Præluderværk action needed to be restored. The original tuning action was reintroduced to the pipework, resulting in lengthened pipes, and the removal of any unoriginal soldering. Original stops were preserved, such as the Trompet ‘8 on the Hovedværk, and many were recreated according to the original scales. The Basun 16’ and Euphonia 8’ are notable because they are free reeds. Free reeds are thin pieces of metal that are only secured to the instrument on one side, allowing for the other end to vibrate and produce a sound similar to the harmonium. The tuning of these reeds is determined mostly by length, and tone can be determined by the thickness, shape, and curvature of the reed. These reeds exist in few organs, but were still used and maintained by Marcussen. This organ might seem loud from the loft, but when heard from below produces a rich sound that fills the beautiful hall.