Walls And Fortresses

Mozambique
Fortresses of Mozambique
March 20, 1990
Fort São Caetano is a fortress that was built in the 16th century in the present town of Sofala, the first Portuguese colony in the region.

Malta
Cittadella
March 9, 2011
Cittadella is a fortress in Victoria on the island of Gozo. The site has been inhabited since the Bronze Age and was transformed into a gunpowder fortress in early 16th century.

On April 16, 1991 Norway issued a set of two stamps (Facit #s 1108-9) commemorating the 350th anniversary of the city of Kristiansand, and the construction of Christiansholm fortress, which was built to defend the city. The 3.20 kr. stamp shows the fortress as it appeared in 1672, and the 5.50 kr. value shows it as it is today.

From Wikipedia, "The fortress was finished in 1672 and formed part of King Christian IV's plan for defense of Kristiansand when the city was built in 1641. The architect of the fortress was quartermaster general William Coucheron...The only time the fortress has been in battle was against a British fleet force led by HMS Spencer in 1807 during the Napoleonic Wars."

Panama
America Issue - World Heritage
2001
Portobelo - San Lorenzo are 17-18 century military fortifications built by the Spanish Empire on the Caribbean Side of Panama.

First of a recently started series of Old Gates of Beijing, the Zheng Yang Gate:

Tunisia
Tourist Sites
December 29, 2019
Borj Lazarit is one of the 17th century fortresses at the entrance to the old port city of Ghar El Melh. From the completely restored battlements there is a breathtaking view of the lagoon and beyond to the Mediterranean.

Alderney
25 years of Alderney Stamps
June 14, 2008
Fort Clonque is a 19th-century coastal fortress in Alderney. It is built on a rocky outcrop joined to the island by a causeway that can be submerged at high tide. It was manned by fifty men and fortified with up to ten guns, mostly 68-pounders.

Guatemala
Defensive Bastions
June 27, 2008
The se-tenant pair depicts St. Rafael de Matamoros Fort and St. José Fort of Buena Vista.

Ukraine
Seven Wonders of Ukraine
November 29, 2012
Kamianets-Podilskyi Castle is a medieval Polish fortress located in the historic region of Podolia. The fortress had as many as 12 towers (7 remain intact today). Its fortification walls were added on over several centuries.

This January 31, 2019 computer-vended stamp of Ireland is one of eight designs released as part of its current definitive series "A History of Ireland in 100 Objects." The stamp shows an old rendering of Tullyhogue Fort, but the inscription reads Leac Na Riogh referring to the ceremonial throne which stood at this location, and is the important feature in Irish History.

From Wikipedia, "Tullyhogue Fort is a large mound on the outskirts of Tullyhogue village near Cookstown, County Tyrone, Northern Ireland...It is an ancient ceremonial site where chieftains of the O'Neill dynasty of Tyrone were inaugurated...The inauguration stone was a large boulder known as the Leac na Ri which meant 'the flagstone of the kings.' It stood outside Tullyhogue Fort, where by the 16th century it had become incorporated into a ceremonial stone chair where three large slabs had been placed around it. In 1602 during the Nine Years War, Lord Mountjoy, in charge of the English forces at war with Lord Tyrone, smashed the inauguration stone to symbolically end the O'Neill's sovereignty." Hugh O'Neill was the last Gaelic chief of Ireland.

On May 22, 1985 Norway issued this stamp (Facit #958) to commemorate the 300th anniversary of Kongsten Fort, or Fredrikstad Fortress. The stamp depicts a calvaryman speaking with farmers below this small fort on the crest of a hill just outside Fredrikstad. The fortress was built to repel Swedish invaders.

From visitnorway.com, "Kongsten Fort is located 500 meters east of the old town. It was built around 1680 on the rocky outcrop of Galgeberget. The fortress was constructed according to the Italian principles of fortification, with high bastions, hornworks, and redans that would provide protection from invading armies. Military strategists understood that, if captured, the small hill would provide the enemy with a raised platform for their artillery, greatly increasing the range of cannon shot."

France
Castles and Mansions
June 11, 2012
Forteresse de Salses is a Catalan fortress in the commune of Salses-le-Château, situated in the French département of Pyrénées-Orientales. The 15th century fortress guarded the former frontier between Spain and France.

Romania
Discover Romania, Moldova
September 8, 2015
Cetatea Neamt is a medieval fortress located in north-eastern part of Romania. It played a key role in the defense system of Stephen III of Moldavia during his reign between 1457 and 1504.

Sri Lanka
Unseen Sri Lanka
December 2, 2006
Fort Hammenhiel is a fortress built around a small island between the islands of Kayts and Karaitivu of Jaffna Peninsula in Northern Sri Lanka. The fortress was built by the Portuguese and Dutch in the 17th century.

Luxembourg
Town Fortifications
May 5, 1986
Fort Thüngen is a historic fortification in Luxembourg City, in southern Luxembourg. The stamp shows the three round towers originally built in 1732.