Oliver Cromwell dismissed the Rump Parliament and replaced it with the Barebones Parliament. It returned power to Cromwell and the Instrument of Government (a paper constitution) established him as Lord Protector.
Editors. "Protectorate of Oliver Cromwell". The Literary Encyclopedia. First published 01 February 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2454, accessed 22 May 2013.]