Simplify the following text for a Grade 6 native English-speaking person.
Original: The capital of Dacia , Sarmizegetusa , located in modern Romania , was destroyed by the Romans , but its name was added to that of the new city ( Ulpia Traiana Sarmizegetusa ) built by the latter to serve as the capital of the Roman province of Dacia .
Simplified: The capital of Dacia was Sarmizegetusa .