Charles XV. died September 18, 1872, and, having no sons, was succeeded by his younger brother, Oscar II. The king and the Storthing at first showed themselves mutually accommodating. The Storthing appropriated the necessary funds for the expense of the coronation at Throndhjem (July 18, 1873), while the king sanctioned the bill abolishing the office of Statholder. But in 1880 the difference between the Storthing and the ministry had brought on a sharp conflict. The liberal majority of the Storthing, in order to introduce parliamentarism, had three times adopted an amendment to the Constitution admitting the cabinet ministers to participation in the debates of the Storthing, and each time the measure had been vetoed by the king. The king, supported by the conservative party and by the opinion of the faculty of law of the university, claimed that the Constitution was a contract between the people and the royal house, and could not, therefore, be changed without the sanction of the king, who thus had an absolute veto in the matter of amendments to the Constitution. The liberal party claimed that in constitutional amendments, as well as in the matter of ordinary laws, the king had only a suspensive veto; and on the 9th of June, 1880, the Storthing adopted a resolution declaring that the amendment providing for the attendance of the cabinet ministers at the meetings of the Storthing was law in spite of the veto. The conflict steadily grew sharper, and in 1883 the members of the ministry (headed by Minister of State Selmer) were impeached for failure to promulgate the resolution of June 9, 1880. The ministers were found guilty and removed from office in the spring of 1884. The king once more tried a ministry which was not in accord with the majority of the Storthing, the so-called April Ministry, headed by Schweigaard; but the latter soon resigned, and in June, 1884, the king finally called upon Johan Sverdrup, the acknowledged leader of the liberal majority (the Left), to form a ministry.