Complex sentence: The Ardre image stones were used as paving under the wooden floors of the local church in the Ardre parish of Gotland, and were re-discovered when the church was being restored around 1900.
Split into simpler sentences: The Ardre image stones were re-used as paving under the wooden floors of the local church in the Ardre parish of Gotland. The image stones were re-discovered when the church was being restored around 1900.