This field name is indicative of the existence of a church site, although there have been no visible remains since at least 1917. The field bounding Cae'r Eglwys to the north is referred to as Cae Croes (NPRN 417500). Both fields are located approximately 100m east of Cwm-du farm.

N Vousden, RCAHMW. 28 August 2012