Đại La (chữ Hán: 大羅) also called La Thành (chữ Hán: 羅城) was an old name for the citadel of Hanoi during the third Chinese domination of the 7th and 8th Centuries, and again in the 11th Century under Lý Thái Tổ.
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Đại La Wikipedia(Text) CC BY-SA