Simplify the following text for a Grade 4 native English-speaking person.
Original: TimiÅ oara grew considerably during the reign of Charles I , who , upon his visit here in 1307 , ordered the construction of a royal palace . TimiÅ oara 's importance also grew thanks to its strategic location , which facilitated control over the Banat plain .
Simplified: TimiÅ oara is a city in the Banat area .