ROME — Giorgio Albertazzi, a theater and film actor and director famed especially for playing, well into old age, the emperor’s role based on “Memories of Hadrian,” died Saturday in his native Tuscany. President Sergio Mattarella described Mr. Albertazzi, who was known for his good looks, as a “maestro to generations” of directors and actors. Onstage, often in Shakespeare’s plays, Mr.