FORT FREDERIK - St. Croix  (340) 772-2021
Fort Frederik is open Monday thru Friday, 8:30 am to 4:00 pm and Saturday 1:00 pm to 4:00 pm.  Admission is FREE!

Fort Frederik, also known as Frederiksfort, is a U.S National Historic Landmark in Frederiksted, United States Virgin Islands.  It was built in the 18th century by the Danish government to protect St. Croix against invasion of pirates, smugglers and European powers.  It was the center of the abolition of slavery in the Virgin Islands in 1848. This deep red rubble and masonry fort, and the trapezoidal design is typical of classic Danish military architecture of the period.

Fort Frederik was the focal point of two important events that led to the dissolution of the slave-based economy of the Virgin Islands. In 1848, Emancipation Revolt ended slavery in the Danish West Indies, but inaugurated a 30-year period of serfdom based on contract labor that ensured continuing control by plantation owners. Then in 1878, escalating tensions erupted into the Labor Riot and Fireburn, which ended the contract labor system.

The fort has served as a jail, police station, fire station and courthouse since the purchase of the Virgin Islands by the U.S. in 1917.

It was listed as a contributing property in the Frederiksted Historic District in 1976.  It was individually listed on the National Register of Historic Places in 1996.  It was further declared a National Historic Landmark in 1997.

Fort Frederick has a display related to the Fredensborg, a ship that was part of the "Triangle Trade" from Europe, to Africa and ST. Croix and back to Europe. The ship sank just off coast in Denmark; the first mate saved the ship's log. At the Fort are records about the sale of the slaves which occurred in St. Croix.

Located at the North end of the town of Frederksted, South of junction of Mahogany Road and  Rt. 631 or just north of the pier in Frederiksted. 
FORT CHRISTIAN - St. Thomas   (340) 776-4566 (OPEN during restorations.
Fort Christian is opened  is open Monday-Friday, 8:30am to 4:30pm, although it is currently being restored.  
Fort Christian, a National Historical Landmark is located between Veterans Dr. and Emancipation Garden in the town of Charlotte Amalie, St. Thomas Island, U.S. Virgin Islands.
The museum has exhibits on the history of the Virgin Islands from the Stone Age to the present, as well as a natural history section, a furniture collection from the Danish period and an art gallery.
History
On May 25, 1672, Governor Jørgen Iversen led the second expeditionary force from Denmark to St. Thomas. Iversen then initiated construction of Fort Christian, named after Danish King Christian V.  By 1676, builders had completed the fort's outer walls and placed a three-story oval tower in the courtyard against the north curtain. Trygborg, as the tower was named, had gun platforms on its two upper stories and roof. In February 1678, two years after construction began, a French force attacked St. Thomas and was repulsed. Until it was demilitarized during the 1870s, the fort underwent enlargement and repair; after the military departed, Fort Christian served as the police headquarters of the Virgin Islands. In the ensuing years, Trygborg tower and the north curtain were demolished, along with the entire north and most of the east ravelins. The present one-story Gothic revival structure, with its centered three-tiered tower, was built between the northeast and northwest bastions to replace the demolished north curtain.

THE BATTERY - St. John
 
In 1825, the Danish government opened a new courthouse and prison in Cruz Bay.
 
The structure was intended to improve the treatment of the enslaved on  the island St. John, by making justice a government matter, rather than leaving it in the hands of the plantation owners.
 
The Battery as it is now known, is the only government building from the Danish Colonial period that remains.