Court of the Bishop of Durham (Episcopal Consistory)
For a general explanation about probate records in England, click here.
This court had jurisdiction over the entire county.
The Family History Library has film copies of original wills, inventories and administrations, 1540-1858. They can be viewed in the library or in one of the family history centers worldwide.
The Family History Library has film copies of the indexes, 1540-1858.
Index of wills, etc., in the Probate registery, Durham, and from other sources, 1540-1599 
Index to Durham wills in the probate registry 1540-1812