Titulus Regius ("royal title" in Latin) is a statute of the Parliament of England, issued in 1484, by which the title of King of England was given to Richard III. The act ratifies the declaration of the lords and the members of the House of Commons, in the year before, that the marriage of Edward IV of England to Elizabeth Woodville had been invalid, and consequently their children, including Edward, Richard and Elizabeth, were illegitimate and, therefore, debarred from the throne. Thus Richard III had been proclaimed the rightful king. But as the Lords and Commons had not been officially convened as a parliament, doubts had arisen as to its validity, so when Parliament convened it enacted the declaration as a law.