| 31. | Arrow slits, concealed doors for sallies, and deep water wells were also integral to resisting siege at this time.
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| 32. | A covered walkway with arrow slits went along the top of walls and above the walls nine powerful towers were raised.
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| 33. | The towers were built on three levels with arrow slits in each level and basements below, which have survived intact.
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| 34. | The two massive Ayyubid defense towers were built with thick stone walls into which the deep arrow slits were discreetly inserted.
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| 35. | There are small square windows on the south side facing the creek; all of the other openings are arrow slits.
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| 36. | The southern side had seven rooms with 52 arrow slits, and the northern side had five rooms with 21 arrow slits.
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| 37. | The southern side had seven rooms with 52 arrow slits, and the northern side had five rooms with 21 arrow slits.
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| 38. | The watchtowers at Guang'anmen, Guangqumen, Zuo'anmen, and You'anmen each had 22 arrow slits.
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| 39. | From the outside, the Palace of Europe resembles a fortress, since the rows of windows are arranged like arrow slits.
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| 40. | It had battlements and turrets, arrow slits, window panes in the gothic style, and was topped with a crest.
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