경주시

In a sentence

• 경주시는 한국의 역사 도시입니다.

  Gyeongju is a historical city in Korea.

  Here, '경주시' is used as a proper noun referring to a specific city, Gyeongju.

• 여름 휴가 때 경주시를 방문할 계획이에요.

  I plan to visit Gyeongju during the summer vacation.

  In this sentence, '경주시' refers to the city as the destination of an action.

• 경주시에서 많은 문화유산을 볼 수 있습니다.

  You can see many cultural heritages in Gyeongju.

  Here, '경주시' is the location where the described activity occurs.