In the sentence:  'Aeneas, whom Dido loved, left Carthage for Italy.' Is 'Aeneas' a relative clause, a relative pronoun or an antecedent?

In the sentence:  'Aeneas, whom Dido loved, left Carthage for Italy.' Is 'whom' a relative clause, a relative pronoun or an antecedent?

In this lesson, we will look at the present participle.