Cylindrical _ structures _ desc ; castles and churches expanded in grace and effectiveness through the introduction of cylindrical structures as round towers and cupolas 通过引入圆柱式建筑的圆塔和炮楼，为城堡和教堂增添了优雅和防御力。
2.
The house consists of three rows of houses arranged to form a rectangle . all the houses are interlinked by passages and small courtyards . embrasures and loopholes were arranged orderly on the fortified walls and defensive towers were built at the four corners to ward off enemies 曾大屋呈长方形，共三进。屋与屋之间有通道及天井相连；围墙上有排列整齐之枪孔及了望孔，围墙的四角有更楼和炮楼，用以防御外敌入侵。
3.
Kat hing wai , in the east of yuen long town centre , has a very long history . it was built during the ch ing - hua period ( 1465 - 87 ) of the ming dynasty . the walled village is in the shape of a square completely surrounded by brick walls erected to protect the villagers against thieves 吉庆围建于明朝成化年间(公元一四六五年至一四八七年) ，呈方形的外墙由青砖筑成，长一百公尺，四角设有炮楼，具有高度防御盗贼的作用。
