Simplify the following text for a Grade 6 native English-speaking person.
Original: The Bastille was built as an irregular rectangle with eight towers , 70 metres ( 220 ft ) long , 30 metres ( 90 ft ) wide , with towers and walls 25 metres ( 80 ft ) high , surrounded by a broad moat .
Simplified: The Bastille was built in a rectangle shape , 70 meters ( 220 ft ) long and 30 meters ( 90 ft ) wide . It had eight towers and walls 25 meters ( 80 ft ) high , with a wide moat going around the outside .