Simplify the following text for a Grade 6 native English-speaking person.
Original: The Bastille originated as the Saint-Antoine gate , but from 1370 â `` 1383 this gate was extended to create a fortress to defend the east end of Paris and the HÃ tel Saint-Pol royal palace .
Simplified: At first it was just the Saint-Antoine gate , but from 1370 â `` 1383 , this gate was made bigger and became a fortress . It defended the east end of Paris and the HÃ tel Saint-Pol royal palace .