Château de Jonzac is situated in the Charente-Maritime, France. The castle, dating back to 1073, had its first known lord, Guillaume de la Rochandry, in the early 12th century. The inscription of 1449 indicates its reconstruction after damages from the Hundred Years' War. In 1505, Jean de Sainte-Maure founded the Carmelite monastery on the castle's remains. The castle hosted notable figures, including Louis XIV, the Queen Mother, and Mazarin, in 1659.
The Sainte-Maure family held the castle until the late 17th century, passing through marriage to the Espardes de Lussan until the Revolution. Currently, the north wing houses the City Hall, restored in the 19th century, and the south wing accommodates the sub-prefecture. The cloister, restored in 1976-1978, now serves as a cultural center with exhibition rooms and an archaeological museum.
The medieval enclosure includes a moat, later filled in the 19th century but reopened in the early 21st century. The imposing entrance gatehouse, marked 1549, is from the 16th century, as is the northwest tower. The smaller-diameter southwest tower is from the 17th century. The courtyard, surrounded by modified buildings, underwent alterations in the 19th century.
The castle features an intricate facade along the Seugne River, retaining crenellations, corbelled turrets, and balustrade balconies. The towers have slate roofs with tall pepper-pot designs. The entrance gatehouse has a peculiar double-pitched roof connecting two pepper-pots.
The castle, serving as a public building, houses the City Hall and sub-prefecture.
References:Carlsten is a stone fortress built on the orders of King Carl X of Sweden following the Treaty of Roskilde, 1658 to protect the newly acquired province of Bohuslän from hostile attacks. The site of Marstrand was chosen because of its location and its access to an ice free port. Initially a square stone tower was constructed, but by 1680 it was reconstructed and replaced by a round shaped tower. Successive additions to the fortress were carried out, by the inmates sentenced to hard labour, until 1860 when it was reported finished. The fortress was decommissioned as a permanent defense installation in 1882, but remained in military use until the early 1990s.
The fortress was attacked and sieged twice falling into enemy hands. In 1677 it was conquered by Ulrik Frederick Gyldenløve, the Danish military commander in Norway and in 1719 by the Norwegian Vice-Admiral Tordenskjold. At both occasions the fortress was returned to Swedish control through negotiations and treaties.