The previous church at Eggleston, called Holy Trinity, lies in ruins in the gardens of Eggleston Hall and can be visited when the gardens and nursery are open. They are open most days. A plan and listing of the memorial stones to be found in the old churchyard there can be downloaded using the link below.
Holy Trinity Church, Eggleston
St Mary's Church, Middleton-in-Teesdale
In October 2025 the Friends of St Mary's Church issued an update on how the restoration project is progressing, this can be downloaded with the following link.