Unlike earlier forts, polygonal forts had no bastions, which had proved to be vulnerable. As part of ring fortresses, polygonal forts were generally arranged...

Fort Napoleon in Ostend is a polygonal fort built in the Napoleonic era. It has recently been restored and is open to the public. France had occupied...

Fort Delimara (Maltese: Il-Fortizza ta' Delimara) is a polygonal fort in Marsaxlokk, Malta. It was built between 1876 and 1888 by the British as part...

Fort Vaux (French: Fort de Vaux), in Vaux-Devant-Damloup, Meuse, France, was a polygonal fort forming part of the ring of 19 large defensive works intended...

Fort Rohan (Maltese: Forti Rohan), is a large bastioned watchtower and polygonal fort in Marsaxlokk, Malta. The original tower was built by the Order of Saint...

19th-century Māori fortification Peel tower Polygonal fort Promontory fort Qila Redoubt Revetment Ring fort Retrechment Sea fort Seawall Submarine pen Stockade Tower...

Fort Tigné (Maltese: Il-Forti Tigné - Il-Fortizza ta' Tigné) is a polygonal fort in Tigné Point, Sliema, Malta. It was built by the Order of Saint John...

powerful artillery and explosive shells, star forts were replaced by simpler but more robust polygonal forts. In the twentieth century, with the development...

systems. When this style of fortification was superseded by lines of polygonal forts in the mid-19th century, moats continued to be used for close protection...

Device Forts Entrenchment Flèche Gorge Gunpowder magazine Hornwork Kotta mara Lunette Magazine Orillon Ostrog Palanka Place-of-arms Polygonal fort Presidio...

Martello towers, sometimes known simply as Martellos, are small defensive forts that were built across the British Empire during the 19th century, from...

Device Forts Entrenchment Flèche Gorge Gunpowder magazine Hornwork Kotta mara Lunette Magazine Orillon Ostrog Palanka Place-of-arms Polygonal fort Presidio...

Fort Gomer was one of the Palmerston Forts, in Gosport, England, the southernmost and first-built Polygonal fort in the defence line to the west of Gosport...

designed the second version of Fort Delaware "as a huge bastioned polygonal form to be built in masonry." Delafield desired his fort to be "a marvel of military...

House of Kearsney College in South Africa Earl of Pembroke Fort Pembroke, a polygonal fort in Malta HMS Pembroke, the name of eight ships of the Royal...

Polygonal masonry is a technique of stone wall construction. True polygonal masonry is a technique wherein the visible surfaces of the stones are dressed...

ground near the town of Sevenoaks. Delayed by a shortage of funds, the polygonal fort was constructed between 1895 and 1897; it featured vaulted barrack casemates...

Fort Pembroke (Maltese: Il-Fortizza ta' Pembroke) is a polygonal fort in Pembroke, Malta. It was built between 1875 and 1878 by the British to defend...

Device Forts Entrenchment Flèche Gorge Gunpowder magazine Hornwork Kotta mara Lunette Magazine Orillon Ostrog Palanka Place-of-arms Polygonal fort Presidio...

was wrecked by a fire in 1831. Construction began on a much larger polygonal fort in 1836, but this project was derailed by a decade-long legal battle...

George Roach and Company, who also built Staddon Fort. It was built as a five sided polygonal fort, surrounded by a dry ditch. Three sides face landward...

1900s a number of polygonal forts and batteries were built around Malta's coastline and along the Great Fault. In the 1930s and 1940s, Fort Campbell, a series...

the bastions were the main defence of the ditch by fire. In later polygonal forts, caponiers were often roofed and were not intended as a type of covered...

defence forts were built to protect coastal forts. Through the middle 19th century, coastal forts could be bastion forts, star forts, polygonal forts, or...

Fort Benghisa (Maltese: Il-Fortizza ta' Bengħisa) is a polygonal fort in Birżebbuġa, Malta. It was built between 1910 and 1912 by the British on high...

Device Forts Entrenchment Flèche Gorge Gunpowder magazine Hornwork Kotta mara Lunette Magazine Orillon Ostrog Palanka Place-of-arms Polygonal fort Presidio...

Fort Saint Rocco (Maltese: Forti Santu Rokku), also known as Fort Saint Roca on some maps, is a polygonal fort in Kalkara, Malta. It is located east of...

Fort Mosta (formerly written as Fort Musta, Maltese: Il-Fortizza tal-Mosta) is a polygonal fort in Mosta, Malta. It was built between 1878 and the 1880s...

Fort Tas-Silġ (formerly written as Fort Ta Silc, Maltese: Il-Fortizza tas-Silġ) is a polygonal fort in Marsaxlokk, Malta. It was built between 1879 and...

with the other Palmerston Forts atop Portsdown, to protect Portsmouth from attack from the rear. Fort Widley was a polygonal Fort designed by William Crossman...