Aceh, officially the Province of Aceh, is the westernmost province of Indonesia. It is located on the northern end of Sumatra island, with Banda Aceh being its capital and largest city. It is bordered by the Indian Ocean to the west, Strait of Malacca to the northeast, as well bordering the province of North Sumatra to the east, and shares maritime borders with Malaysia and Thailand to the east, and Andaman and Nicobar Islands of India to the north. Granted a special autonomous status, Aceh is a religiously conservative territory and the only Indonesian province practicing Sharia law officially. There are ten indigenous ethnic groups in this region, the largest being the Acehnese people, accounting for approximately 70% of the region's population of about 5.5 million people in mid-2023. Its area is comparable to Croatia or Togo.

Lamuri, Lamri, or Lambri was a kingdom in northern Sumatra, Indonesia recorded from the 9th century until the early 16th century. The area was inhabited by Hindu population around the seventh century. There is also evidence of Buddhism. The region is also thought to be one of the earliest places of arrival of Islam in the Indonesian archipelago, and in its later period its rulers were Muslims.