Karabalgasun

Ordu-Baliq

The west gate as seen from the citadel
Location of Ordu Baliq in Mongolia
Location	Mongolia
Coordinates	47°25′52″N 102°39′34″E / 47.431111°N 102.659444°E / 47.431111; 102.659444

Ordu-Baliq (meaning "city of the court", "city of the army"), also known as Mubalik and Karabalghasun, was the capital of the first Uyghur Khaganate, built on the site of the former Göktürk imperial capital, 27 km north-to-northeast of the later Mongol capital, Karakorum. Its ruins are known as Kharbalgas in Mongolian, that is, "black city". They form part of the World Heritage Site Orkhon Valley Cultural Landscape.

Ordu-Baliq is situated in a grassy plain called the Talal-khain-dala steppe, on the western bank of the Orkhon River in the Khotont sum of the Arkhangai Province, Mongolia, 16 km northeast of the Khotont village, or 30 km north-to-northwest of Kharkhorin. The Orkhon emerges from the gorges of the Khangai Mountains and flows northward to meet the Tuul River (on whose upper reaches the current capital of Mongolia, Ulan Bator, is located). A favorable micro-climate makes the location ideal for pasturage, and it lies along the most important east-west route across Mongolia. As a result, the Orkhon Valley was a center of habitation and important political and economic activity long prior to the birth of Genghis Khan who made it known to the wider world.

In 744, after the defeat of the last Göktürk Kaghan by the Uigur-Qarluk-Basmyl alliance, the Uyghurs under Bayanchur Khan (Bayan Çor) established their imperial capital Ordu Baliq on the site of the old ördü ("nomadic capital"). Ordu-Baliq flourished until 840, when it was reduced to ruin by the invading Yenisey Kyrgyzes.