Ganden Monastery or Ganden Namgyeling or Gahlden Monastery is one of the "big three" Gelug university monasteries in Tibet. It is in Dagz County, Lhasa. The other two are Sera Monastery and Drepung Monastery. Ganden Monastery was founded in 1409 by Je Tsongkhapa Lozang-dragpa, founder of the Gelug order.