In the 1980s, after twenty years devoted to abstraction, Alfaro brought his Generatrices to a close and opened up to new influences. He returned to traditional sculpture, and so it should come as no surprise to see the emergence in his works of references to classical models and forms.

Influenced by ancient Greek sculpture, by the Italian sculptors Gian Lorenzo Bernini (1598-1680) and Michelangelo (1475-1564) and by the inscriptions or motifs of stelae, he decided to use marble and stone as his primary materials, reaffirming the value of the stone mass as a constitutive element in sculpture.

Located in the gardens of the Marqués de Salamanca Palace, Terna is a sensuous sculpture that pays homage to the Three Graces. Its curves and the insinuated lines are transmuted into torso, hips and neck. Alfaro arrives at this evocation of nature through a process of geometric simplification.