* Subject: The subject is "Painting" – the thing being described.
* Verb: The verb is implied – "is" or "was". The sentence is a simple statement, meaning the verb is a form of "to be".
* Subject Complement: The subject complement is the part of the sentence that renames or describes the subject. In this case, it's "one of the oldest arts".
Therefore, "one of the oldest arts" is the subject complement because it describes the subject "Painting".