Simplify the following text for a Grade 4 native English-speaking person.
Original: The town prospered during the 16th and early 17th centuries , and Hull 's affluence at this time is preserved in the form of several well-maintained buildings from the period , including Wilberforce House , now a museum documenting the life of William Wilberforce .
Simplified: At this time Wilberforce House was built . It is now a museum about William Wilberforce .