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...or - 18.jpg|350px|thumb|left|Fort Massachusetts Interior from the Barbette Tier. Note the Circular Stairs in the Center.]] ...e war and rises to the top of the casemates. The brickwork on the Barbette tier resumed the use of Louisiana "Grey" brick after the war. The [[U.S. Corps ...

...inch coastal gun battery built during [[World War II]] on the top Barbette tier of old [[Fort Point (3) ]], San Francisco County, California. Battery const ...inally built as a [[World War II]] coastal gun battery on the top Barbette tier of Old Fort Point on [[Fort Winfield Scott]]. Armed with four 3" M1902MIMI ...

...(land side) approach was left open. The old star fort became the Barbette tier covering the front and rear. Two flanking Barbette batteries were to provid ...

Constructed as a three-tier round masonry fort between 1807-1811. Designated as a Castle because of the ...first two tiers of Castle Williams contained 26 embrasures each, the third tier was meant to house troops but also contained 26 embrasures. Addition gun em ...

...hrough large Totten embrasures, and along the top barbette tier. The third tier of casemates was never built. ...- 05.jpg|thumb|left|200px|Fort Jefferson Rifled Parrot Gun on the Barbette Tier]] ...

...suspension of work before the walls reached their design height. Only one tier was completed and that was not fully complete in some places. ...

...wo demibastions. Two circular stair towers provide access to each casemate tier and the unfinished parapet. A moat separated the fort from the land side. ...

...ers designed to mount 232 guns). About half of the second casemate and one tier was completed when work stopped in 1830 because the island was sinking at a ...

...southeast casemates of the old fort structure with the front of the lower tier sealed and turned into a magazine for the guns on the upper level. ...

...ns to the fort during the [[Endicott Period]] reduced the fort to a single tier of casemates to reduce the possibility of enemy damage to the brick walls. ...a single tier of two-story casemates. On top of each tower was a barbette tier with four gun emplacements. ...

...uilt into the southwest casemates of the old fort structure with the lower tier filled in and sealed as protection for the magazines. ...

...uilt into the southwest casemates of the old fort structure with the lower tier filled in and sealed as protection for the magazines. ...

...rt Sumter was reconstructed but reduced to a two-tier structure. The first tier was restored with 100-pounder Parrott rifles. The fort was unmanned in the ...

...eted in 1811. Designed with eight foot thick walls and 28 guns in a single tier of casemates. The embrasures were designed so that an incoming cannon ball ...

...suport for outlying batteries with occasional guns mounted on the barbette tier. In places where there was no [[Third System]] fort the batteries provided ...

...were finally relocated to [[Fort Point (3)]] to a battery on the Barbette Tier in 1943. Emplacements #5 and #6 were first relocated to [[Battery Kirby Bea ...

...and flanking howitzers. Most of the armament was emplaced on the barbette tier. ...

...land side and the sea side. The walls were never completed above the first tier and modifications in the form of earthworks were built as temporary protect ...

Image:FortPoint_1870.jpg|The Barbette tier of Fort Point 1870 ...

...all along the back. The two long walls on the riverside contained a single tier of casemates for river facing cannons. The terreplein on top of all five si ...