Simplify the following text for a Grade 6 native English-speaking person.
Original: The Kingdom of Hanover founded a rival town next to Bremerhaven and called it GeestemÃ 1\/4 nde ( 1845 ) .
Simplified: A city called GeestemÃ 1\/4 nde was founded in 1847 as a `` rival '' of Bremerhaven .