What musical style means in the of chapel Italian?

There isn't a single musical style specifically called "chapel Italian." The term "chapel" in a musical context generally refers to music performed in a chapel, often religious music. Italian, of course, refers to the country of origin or the language used in the music (for example, the text of a vocal work).

So, "chapel Italian" would describe music that:

* Is Italian in origin or style: This could encompass a wide range of periods and styles, from Renaissance polyphony to Baroque opera to later forms.

* Is intended for performance in a chapel or church: This would typically suggest sacred music, such as masses, motets, or hymns.

Therefore, "chapel Italian" isn't a defined genre but rather a descriptive phrase indicating the likely characteristics of the music. To understand the specific style, you'd need more information—for example, the composer, the period, or the type of composition.