The Pāla Empire (r. 750-1161 CE) was an imperial power during the post-classical period in the Indian subcontinent, which originated in the region of Bengal. It is named after its ruling dynasty, whose rulers bore names ending with the suffix Pāla ("protector" in Prakrit). The empire was founded with the election of Gopāla as the emperor of Gauda in late eighth century AD. The Pala stronghold was located in Bengal and eastern Bihar, which included the major cities of Gauḍa, Vikramapura, Pāṭaliputra, Monghyr, Somapura, Ramavati (Varendra), Tāmralipta and Jaggadala.

The Pālas were astute diplomats and military conquerors. Their army was noted for its vast war elephant corps. Their navy performed both mercantile and defensive roles in the Bay of Bengal. At its zenith under emperors Dharmapala and Devapala in the early ninth century, the Pala empire extended their dominance into the northern Indian region, with its territory stretching across the Gangetic plain to include some parts of western, southern and northeastern India, Nepal and Bangladesh. Dharmapala also exerted a strong cultural influence through Buddhist scholar Atis Dipankar in Tibet, as well as in Southeast Asia. Pala control of North India was ultimately ephemeral, as they struggled with the Gurjara-Pratiharas and the Rashtrakutas for the control of Kannauj and were defeated. After a short lived decline, Emperor Mahipala I defended imperial bastions in Bengal and Bihar against South Indian Chola invasions. Emperor Ramapala was the last strong Pala ruler, who gained control of Kamarupa and Kalinga. The empire was considerably weakened with many areas engulfed and their heavy dependence on Samantas being exposed through 11th century rebellion. It finally led to the rise of resurgent Hindu Senas as sovereign power in 12th century and final expulsion of the Palas from Bengal by their hands marking the end of last major Buddhist imperial power in the subcontinent.

The Pala period is considered one of the golden eras of Bengali history. The Palas brought stability and prosperity to Bengal after centuries of civil war between warring divisions. They advanced the achievements of previous Bengali civilisations and created outstanding works of arts and architecture. The Charyapada in Proto-Bengali language was written by Buddhist Mahasiddhas of tantric tradition, which laid the basis of several eastern Indian languages in their rule. Palas built grand temples and monasteries, including the Somapura Mahavihara and Odantapuri, and patronised the great universities of Nalanda and Vikramashila. The empire enjoyed relations with the Srivijaya Empire, the Tibetan Empire and the Arab Abbasid Caliphate. Islam first arrived in Bengal during this period as a result of flourishing mercantile and intellectual contacts with Middle-East. The Pala legacy is still reflected in Tibetan Buddhism.