Roi fainéant (French pronunciation: [?wa f?ne]), literally "do-nothing king", is a French term primarily used to refer to the later kings of the Merovingian dynasty after they seemed to have lost their initial powers of dominion. It is usually applied to those Frankish rulers approximately from the death of Dagobert I in 639 AD (or alternatively[clarification needed], from the accession of Theuderic III in 673) until the deposition of Childeric III in favour of Pepin the Short in 751.
There was nothing left the King to do but to be content with his name of King, his flowing hair, and long beard, to sit on his throne and play the ruler, to give ear to the ambassadors that came from all quarters, and to dismiss them, as if on his own responsibility, in words that were, in fact, suggested to him, or even imposed upon him. He had nothing that he could call his own beyond this vain title of King and the precarious support allowed by the Mayor of the Palace in his discretion, except a single country seat, that brought him but a very small income.-- Einhard (translated by S. E. Turner, 1880)
During the century of the rois fainéants, the Merovingian kings were increasingly dominated by their mayors of the palace, in the 6th century the office of the manager of the royal household, but in the 7th increasingly the real "power behind the throne" who limited the role of the king to an essentially ceremonial office.