Ralpachen, a prominent figure in Tibetan history, was born in the early ninth century and ascended to the throne around the year eight hundred fifteen. He was the second eldest of five brothers, succeeding his father, Sadnalegs, and expanding the Tibetan Empire to its largest extent during his reign. His leadership was marked by significant military engagements, particularly with the Tang Empire, culminating in the Tibet–Tang treaty of eight hundred twenty-one to eight hundred twenty-three.
As one of the revered 'Three Dharma Kings of Tibet', Ralpachen played a crucial role in the promotion of Buddhism in the region. His reign was characterized by the flourishing of Mahayana Buddhism, the establishment of monasteries, and the support of Buddhist practices, which were pivotal in shaping Tibetan culture. He is often referred to as the 'son of God' in the ancient Tibetan chronicle, the Testament of Ba, highlighting his esteemed status.
Tragically, Ralpachen's life was cut short in eight hundred thirty-eight when he was murdered by his younger brother, Langdarma, who was deemed unfit to reign. This event marked a significant turning point in Tibetan history, as Langdarma's subsequent rule led to the near destruction of Buddhism in Tibet, reversing the progress made during Ralpachen's reign.
Ralpachen's legacy endures as a pivotal monarch who not only expanded the Tibetan Empire but also fostered the growth of Buddhism, leaving an indelible mark on the spiritual and cultural landscape of Tibet.