🇹🇷 Turkey · Fortified city
Dara (Anastasiopolis)
Late Roman–Byzantine (505 CE–1071 CE) · Eastern Roman (Byzantine) vs Sasanian Persian
Justinian border megafort with 3.5 km walls, earliest arch dam and 18 m deep rock-cut Great Cistern.
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Tagsarch-dam
4 places carry this tag, across every kind and continent it appears in.
🇮🇷 Iran · Hydraulic works
Ilkhanid to Qajar (Mongol to Qajar) · Mongol–Persian Ilkhanid hydraulic engineers (maybe Ghiyath al-Din?)
1350 Mongol thin arch 64 m with 1.05 m crest over 5-m gorge, world's tallest for 540 years (1350–1902).
🇮🇷 Iran · Hydraulic works
Ilkhanid Mongol (1300) to Safavid · Mongol–Persian hydraulic (Rashid al-Din's Jami' al-Tawarikh?), Qom Shi'a
1300 Mongol 26-m arch radius 35 m, oldest surviving arch dam (first Mongol), 294 yr before Tibi Europe.
🇮🇷 Iran · Hydraulic works
Timurid (Tamerlane) to Safavid (1350–1590) · Timurid Persian (Turko-Mongol Persianized); Mashhad Imam Reza shrine
1350 Timurid 24-m arch 96 m on Golestan gorge feeding Mashhad Imam Reza 8-km garden canal, still lake.
🇹🇷 Turkey · Fortified city
Late Roman–Byzantine (505 CE–1071 CE) · Eastern Roman (Byzantine) vs Sasanian Persian
Justinian border megafort with 3.5 km walls, earliest arch dam and 18 m deep rock-cut Great Cistern.