This is the 10706th most frequent Korean word.
궁전을
"궁전을" means "palace" (in the accusative case).
In this sentence, '궁전을' is the object of the verb '방문하고 싶어요' (want to visit) and denotes the place being visited.
저는 궁전을 방문하고 싶어요.
I want to visit the palace.
Here, '궁전을' is the object of the verb '봤어요' (saw) and specifies what was seen.
그는 아름다운 궁전을 봤어요.
He saw the beautiful palace.
In this example, '궁전을' serves as the direct object of the verb '복원했어요' (restored) and indicates the structure being restored.