Who has a higher rank, a professor of calligraphy or a doctor of calligraphy?

Calligraphy professors have a high level. Calligraphy professor is a new term in the development of modern calligraphy art.

Calligraphy professor is a title for people who have made certain achievements in calligraphy art and have rich teaching experience. Generally employed by institutions of higher learning or legal social organizations, or art institutions with calligraphy research majors.