Source: K-J Tonner.
Triererhof is the property at the bottom center of the map. St. Remegius Church in Retterath is located in the triangular area on the right. (The church was enlarged at a later date.)
This map overlaps the Retterath map found with the Johann Diederich-Susanna Harig family. The road leading to the bottom right corner of the Retterath map coincides with the one on the Trierhof map that runs to the left edge about a third of the way down the map.