Aceh is the westernmost province of Indonesia. It is located on the northern end of Sumatra, with Banda Aceh being its capital and largest city. 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 80% to 90% of the region's population.