Roman Catholic Diocese of Hildesheim in the context of "Louis the German"

Hildesheim Cathedral (German: Hildesheimer Dom), officially the Cathedral of the Assumption of Mary (German: Hohe Domkirche St. Mariä Himmelfahrt) or simply St. Mary's Cathedral (German: Mariendom), is a medieval Roman Catholic cathedral in the city centre of Hildesheim in Lower Saxony, Germany, that serves as the seat of the Diocese of Hildesheim. The cathedral has been on the UNESCO World Cultural Heritage list since 1985, together with the nearby St. Michael's Church because of its unique art and outstanding Romanesque architecture.

The cathedral church was built between 1010 and 1020 in the Romanesque style. It follows a symmetrical plan with two apses, that is characteristic of Ottonian Romanesque architecture in Old Saxony. The cathedral's treasures include world-famous artworks, bronze works from the time of Bishop Bernward, Bernward Doors and Bernward Column, as well as two of the four notable Romanesque wheel chandeliers: the Hezilo chandelier and the Azelin chandelier.

This list records the incumbents of the Roman Catholic Diocese of Hildesheim (German: Bistum Hildesheim). Between 1235 and 1803 the bishops simultaneously officiating as rulers of princely rank (prince-bishop) in the Prince-Bishopric of Hildesheim (German: Hochstift Hildesheim), a state of imperial immediacy within the Holy Roman Empire. Hildesheim is the seat of the bishops and the cathedral chapter.

Heiner Wilmer, SCJ (born 9 April 1961, in Schapen) is a German Catholic prelate who has served as the Bishop of Hildesheim since 2018. He was formerly the superior general of the Congregation of the Priests of the Sacred Heart (Dehonians).