Baldan Bereeven Monastery (Mongolian: Балдан бэрээвэн хийд) is a Gelugpa (Yellow Hat) Buddhist monastery located in the Baruun Jargalant River valley Ömnödelger district, Khentii Province, Mongolia. First established in 1654, the monastery grew to be one of the largest and most important in Mongolia at its height in the mid 19th century, housing up to 8000 monks. The monastery and temple complex were destroyed by Mongolia’s communist regime in 1937.