“We had found the tomb,” he said. “We’ve now also found the altar referred to in ancient texts, as well as the road leading to the tomb, which was very close to the city’s ancient marketplace within the city settlement.”

Although the evidence of whose tomb it was is circumstantial, several characteristics — its location and panoramic view; its positioning at the center of a square marble floor; and the time of its construction, estimated to be at the very beginning of the Hellenistic period, which started after the death of Aristotle’s most famous student, Alexander the Great, in 323 B.C. — “all lead to the conclusion that the remains of the arched structure are part of what was once the tomb-shrine of Aristotle,” Mr. Sismanidis said.

Aristotle, who was born in 384 B.C., was a pupil of Plato in Athens and became a crucial figure in the emergence of Western philosophy. His work forms the basis of modern logic, and his metaphysics became an integral part of Christian theology. His “Poetics” still offers penetrating analysis of what works, and does not work, in theater. King Philip II of Macedon engaged him as a tutor to his son Alexander.

A separate excavation in another part of northern Greece, Amphipolis, in 2014 led to the discovery of the largest ancient tomb ever found in the country. Speculation linking the tomb to Alexander the Great set off huge media interest, but archaeologists later concluded that it had probably been built for a close companion of the king and conqueror.