Fig. 5

Locations of the XRF measurements. a Measurement 111 with no white substance and b measurement 113 with white substance were taken on the southern exterior door. c Measurements 117, 118 and 119 (marked with white arrows) on the exterior wall left of the southern entrance with staining. d Measurement 110 with no white substance and e measurement 106 with white substance were taken on the bench inside the church. f Measurement 125 was taken on the white substance on the wall by the entrance (marked with a red circle). g Measurement 126 was taken on the white substance on the crossbar. h Measurement 120 was taken on the stave base with a white substance. i Measurement 122 was taken on the stave without a white substance and j Measurement 121 was taken on the floor with a white substance. k Measurement 116 was taken on the bird droppings