Complex sentence: The original Saxon settlement at Stevenage was on the site of the present St Nicholas' Church was a village of wooden huts, which may have been centered around a small wooden church on a hilltop, or may have been a more scattered collection of farmsteads.
Split into simpler sentences: The original Saxon settlement at Stevenage, a village of wooden huts, was on the site of the present St Nicholas' Church. The village may have been centered around a small wooden church on a hilltop, or may have been a more scattered collection of farmsteads.