Simplify the following text for a Grade 15 native English-speaking person.
Original: Surviving 16th and early 17th century specimens in England , Wales and Scotland are numerous , for example those at Longleat ( England ) , Burghley House ( England ) , Bodysgallen Hall ( Wales ) , Muchalls Castle ( Scotland ) and Crathes Castle ( Scotland ) ; however , by the late 18th century the great hall was beginning to lose its purpose .
Simplified: There are lots of 16th century and early 17th century halls in England , Wales and Scotland , for example those at Longleat ( England ) , Burghley House ( England ) , Bodysgallen Hall ( Wales ) , Muchalls Castle ( Scotland ) and Crathes Castle ( Scotland ) ; however , by the late 1700s the great hall was beginning to lose its purpose .