Apex domains cannot have CNAME records.
Question and response
Question
dig historichotelsitaly.com. NS
Answer
historichotelsitaly.com. 5 NS ns-1264.awsdns-30.org.
historichotelsitaly.com. 5 NS ns-757.awsdns-30.net.
historichotelsitaly.com. 5 NS ns-594.awsdns-10.net.
historichotelsitaly.com. 5 NS ns-1146.awsdns-15.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0