Jure

Paradoxically, the President of Turkey is the de jure head of state but has no legal role in government.

Source: tatoeba (4586353)

This is a queer old book I picked up at a stall yesterday—De Jure inter Gentes—published in Latin at Liege in the Lowlands, in 1642.

Source: tatoeba (6309903)

Matilda, who herself claimed no title beyond that of “Domina of England,” was queen de jure, and, in a historical view, a monarch of high importance, as the mother of the Plantagenets, and the uniting link of the Anglo-Saxon and Anglo-Norman dynasties.

Source: tatoeba (11993018)