sentences:  The earliest masonry building was the church, which was constructed on shallow foundations of sandstone rubble and pebbles on boulder clay.The walls were built in local red sandstone with ashlar faces and a rubble and mortar core.The ground plan of the original church was cruciform, and consisted of a nave without aisles, a choir at the crossing with a tower above it, a square-ended chancel, and north and south transepts, each with an eastern chapel.