Original: The parliament, which is also referred to as the Estates of Scotland, the Three Estates, the Scots Parliament or the auld Scots Parliament, met until the Acts of Union merged the parliament of Scotland and the Parliament of England, creating the new Parliament of Great Britain in 1707.
Simplified: The parliament, which is also referred to as the Estates of Scotland, the Three Estates  the Scots Parliament or the auld Scots Parliament, met until the Acts of Union in 1707.