The Kitanomaru Park is located to the north and is the former northern enceinte of Edo Castle.
From the en.wikipedia.org
The enceinte has nineteen openings or gateways, but of these seven are not used by the public.
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A castle could have several baileys but only one enceinte.
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The town itself is surrounded with an enceinte.
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Symbolic trees representing each prefecture in Japan are planted in the northwestern corner of Ninomaru enceinte.
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After the establishment of Belgian independence, Antwerp was defended by the citadel and an enceinte around the city.
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The northwest corner is enclosed by another enceinte wall forming the inner ward and the heart of the castle.
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Town Major Provost oversaw the construction of eleven small stone redoubts in this enceinte, which would have protected against cannon.
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This enceinte is protected by a broad wet ditch, and in the caponiers are the magazines and store chambers of the fortress.
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More examples
Big(p): in an advanced stage of pregnancy; "was big with child"; "was great with child"
Enceinte (From Latin en, "within" and cinctus, "girdled"; to be distinguished from the Latin word meaning "pregnant", from in, not, and cinctus, i.e. ...
Pregnant, expecting a baby
The enclosure or fortified area of a castle.
An enclosing wall, usually exterior, of a fortified place.
(Fr.) -- "body of the place," area of a fort or redoubt enclosed by the parapet.
Med. jur. A French word, which signifies pregnant.