The Virgin Islands, commonly known as the British Virgin Islands (BVI), is a British overseas territory located in the Caribbean to the east of Puerto Rico. The islands make up part of the Virgin Islands archipelago, the remaining islands constitute the US Virgin Islands and the Spanish Virgin Islands. The official name of the Territory is still simply the "Virgin Islands", but the prefix "British" is often used to distinguish it from the neighbouring American territory which changed its name from the "Danish West Indies" to "Virgin Islands of the United States" in 1917.