Questions & Answers about Questo museo è molto popolare.
In Italian, a demonstrative like questo already does the job of this, so you do not also use the definite article.
So Italian says:
- questo museo = this museum
Not:
- il questo museo ❌
This is similar to English, where you say this museum, not the this museum.
The accent is important because è means is.
Without the accent, e means and.
So:
- è = is
- e = and
That small accent changes the meaning completely.