The original Parliament of Scotland (or "Estates of Scotland") was the national legislature of the independent Kingdom of Scotland. It existed from the early 13th century until 1707. This was when the Kingdom of Scotland merged with the Kingdom of England under the Acts of Union 1707 to form the United Kingdom of Great Britain. Because of this, the Parliament of Scotland merged with the Parliament of England to form the Parliament of Great Britain, which sat at Westminster in London. This legislature merged with the Irish Parliament from 1801 to make the current Parliament of the United Kingdom.