Fort Hommet (or Fort Houmet) was built on the site of fortifications dating back to 1680, and consists of a Martello tower from 1804, later additions during the Victorian Era, and bunkers and casemates that the Germans constructed during World War II.
The Martello tower was constructed after the onset of the Napoleonic Wars, and during the tenure (1803-1813) of Lieutenant GovernorGeneral Sir John Doyle. To simplify matters, Doyle had a local builder named Gray construct the tower, and two others, see below, under the rubric of 'fieldworks', thereby bypassing the Ordnance Corps.
The Fort Hommet tower, like the other two Guernsey martello towers, Fort Grey and Fort Saumarez, was intended as a keep for the battery in which it was placed. The Guernsey martellos are all smaller than the British martello towers, with the Fort Saumarez and Fort Hommet towers being smaller than the Fort Grey tower. Each mounted a 24-pounder carronade on the roof to support the battery. Fort Saumarez and Fort Hommet also have exterior staircases up to the second floor.
During the Victorian Era, the fort received additional batteries and barracks. In 1852, 68-pounder and 8' shell guns replaced some of the 24-pounder guns in the batteries.
The largest addition, however, occurred during World War II and the German occupation of the Channel Islands. The Germans recognized the enduring utility of the site and fortified it further, creating the Stützpunkt (Strongpoint) Rotenstein.
After the liberation of Guernsey in 1945, the British Army and the islanders stripped the fortifications. By the late 1940s all the metal fittings including guns and blast doors had been removed for scrap. Many of the bunkers including the gun-casemate at Fort Hommet, were buried in an attempt to return the coastal landscape to its pre-war condition.
More recently, the States of Guernsey have restored parts of the fort, and particularly the Fort Hommet 10.5 cm Coastal Defence Gun Casement Bunker. This is now open to visitors, though with restrictive hours.References:
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.