Simplify the following text for a Grade 5 native English-speaking person.
Original: Croydon Palace was the summer residence of the Archbishop of Canterbury for over 500 years and included regular visitors such as Henry III and Queen Elizabeth I. It is thought to have been built around 960 .
Simplified: Croydon Palace is where Archbishops of Canterbury used to stay when it 's summer . It has stood for over 500 years .