Complex sentence: Unlike the many English cathedrals of monastic foundation, Wells has retained an exceptional number of buildings associated with its chapter of secular canons: the Bishop's Palace and the Vicars' Close, a residential street that has survived from the 15th century.
Split into simpler sentences: Unlike the many English cathedrals of monastic foundation, Wells has retained an exceptional number of buildings associated with its chapter of secular canons. This includes the Bishop's Palace and the Vicars' Close, a residential street that has survived from the 15th century.