Baldwin, like most medieval bishops, was a patron of his see.

Swithwulf (died between 867 and 896) was a medieval Bishop of London.

Æthelweard (died between 909 and 926) was a medieval Bishop of London.

Ælfwig (died circa 1035) was a medieval Bishop of London.

The diocese of the medieval bishops was, until 1559, much larger than the princedom which was in his possession.

Peter (died 1085) was a medieval Bishop of Lichfield.

The castle was thus one of the residences of the medieval bishops and their principal residence in later periods.

Richard Gravesend (died 1303) was a medieval Bishop of London.

Ælfweard (died 1044) was a medieval Bishop of London.

William de la Corner was a medieval Bishop of Salisbury.