Siegfried II of Querfurt (mid 13th century – 5 May 1310) was the Prince-Bishop of Hildesheim from 1279 to 1310.
Siegfried was born to a noble family from the city Querfurt (which now belongs to Saxony-Anhalt).
This was one part of his defense strategy of the Prince-Bishopric of Hildesheim that he was head of in his role as prince-bishop.
Two other parts of this strategy were that he ordered to build a castle in Liebenburg and another one in Ruthe (which now belongs to the municipality of Sarstedt).
Additionally, the citizens of Hildesheim attempted to gain independence while he was prince-bishop.