Since very ancient times, the Maldives were ruled by kings (Radun) and occasionally queens (Ranin). Historically Maldives has had a strategic importance because of its location on the major marine routes of the Indian Ocean. Maldives' nearest neighbors are Sri Lanka and India, both of which have had cultural and economic ties with Maldives for centuries. The Maldives provided the main source of cowrie shells, then used as a currency throughout Asia and parts of the East African coast. Most probably Maldives were influenced by Kalingas of ancient India who were earliest sea traders to Sri Lanka and Maldives from India and were responsible for spread of Buddhism. Hence ancient Hindu culture has indelible impact on Maldives's local culture.