Simplify the following text for a Grade 5 native English-speaking person.
Original: The larger , called Rocca Maggiore , is a massive presence meant to intimidate the people of the town : it was built by Cardinal Albornoz ( 1367 ) and added to by Popes Pius II and Paul III .
Simplified: The larger castle is called Rocca Maggiore . It was built by Cardinal Albornoz in 1367 and was added to by Popes Pius II and Paul III .