Gadaladeniya Rajamaha Vihara, founded by Venerable Dharmakīrti I and built in 1344 CE under King Buwanekabāhu IV, is Sri Lanka’s largest fully completed granite shrine and a remarkable testament to cultural unity, artistic excellence, and spiritual harmony. Designed in a distinct South Indian Dravidian style by the master architect Ganeśvarācāri and constructed by nearly a thousand Dravidian craftsmen together with local artisans, the temple beautifully blends Hindu architectural motifs with impressive Buddhist sculptures. Its construction was supported by Sinhalese and Tamil communities alike—kings, nobles, officials, soldiers, and people of every caste—making it a powerful symbol of social cohesion. The presence of a Viṣṇu shrine within the same structure further highlights the longstanding spirit of interreligious coexistence. Mentioned in chronicles such as the Mahāvaṃsa, cherished by successive kings, home to four Supreme Patriarchs, and the centre of the respected Dharmakīrti monastic lineage, Gadaladeniya Vihara was declared a protected monument in 1956 and continues to stand as a majestic expression of Sri Lanka’s shared heritage and enduring devotion.