Tolong jelaskan mengenai Abad ke-12/13 dari Teks Bizantin

905, 906, 1310, 1341, 1897, 2311

52, 55 60, 74, 107, 121, 128, 136, 141, 147, 167, 170, 192, 198, 204, 219, 220, 227, 248, 260, 284, 291, 292, 293, 303, 305, 309, 327, 328, 342, 359, 361, 362, 384, 388, 390, 410, 449, 469, 473, 477, 479, 482, 483, 484, 496, 500, 501, 511, 519, 533, 534, 546, 553, 554, 558, 573, 574, 592, 593, 597, 601, 663, 666, 677, 684, 685, 689, 691, 696, 705, 714, 715, 725, 729, 737, 757, 759, 775, 811, 820, 825, 830, 835, 840, 897, 898, 900, 912, 914, 966, 969, 970, 981, 995, 997, 999, 1000, 1004, 1008, 1011, 1015, 1016, 1031, 1050, 1052, 1053, 1057, 1069, 1070, 1072, 1087, 1089, 1094, 1103, 1107, 1129, 1148, 1149, 1150, 1161, 1177, 1201, 1205, 1206, 1208, 1213, 1215, 1226, 1238, 1255, 1285, 1339, 1352a, 1400, 1594, 1597, 1604, 1622, 1717, 1717, 1728, 1731, 1736, 1740, 1742, 1772, 1855, 1858, 1922, 1938, 1941, 1956, 1972, 1992, 2111, 2119, 2140, 2141, 2236, 2353, 2376, 2380, 2390, 2409, 2420, 2423, 2425, 2457, 2479, 2483, 2502, 2534, 2540, 2558, 2568, 2584, 2600, 2624, 2627, 2631, 2633, 2645, 2646, 2658, 2660, 2665, 2670, 2696, 2699, 2724, 2761