Simplify the following text for a Grade 8 native English-speaking person.
Original: Phitsanulok is an important and historic city in lower northern Thailand and is the capital of Phitsanulok Province , which stretches all the way to the Laotian border . Phitsanulok is one of the oldest cities in Thailand , founded over 600 years ago .
Simplified: Phitsanulok is an important province in history north of Thailand .