File:EB1911 Rome - Concrete Walls (two sorts).jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:12, 16 May 2016 | 383 × 616 (176 KB) | Library Guy | {{Information |Description ={{en|1=Ancient Roman concrete wall faced with (A) Opus Incertum and (B) Opus Reticulatum. C shows the section, similar in both.}} |Source =''Encyclopædia Britannica'' (11th ed.), v. 23, 1911, “Rome,” p. 587,... |
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