Simplify the following text for a Grade 11 native English-speaking person.
Original: He was required to live in Cambridge to be close to the campus and rented rooms at the Craigie House in the spring of 1837 , now preserved as the Longfellow House-Washington â s Headquarters National Historic Site .
Simplified: He was required to live in Cambridge to be close to the campus and rented rooms at the Craggie House in the spring of 1837 , now preserved as the Longfellow National Historic Site .