It was believed that Fujiwara-kyo was 1.1 km from east to west and 3.2 km from north to south, however, the Dai Fujiwara-kyo (Greater Fujiwara-kyo) was revealed by the discovery of Kyogoku-oji Street from east to west in the 1990's.
東西1.1km、南北3.2キロとみられていたが、1990年代の東西の京極大路の発見で「大藤原京」が想定された。