The Ancient [Monuments Protection Act 1882] had begun the process of establishing legal protection for some of Britain's ancient monuments; these had all been prehistoric sites, such as ancient tumuli. The Ancient Monuments Protection Act 1900 had continued this process, empowering the government's Commissioners of Works and localcounty councils to protect a wider range of properties. In 1908 a royal commission concluded that there were gaps between these two pieces of legislation, and the act was passed, allowing the commissioners and councils to receive ancient monuments as gifts, and making damaging the wider set of ancient monuments described in 1900 legislation a criminal offence in the same way as those covered by the 1882 legislation.