Archaeologists digging at Pylos, an ancient city on the southwest coast of Greece, have discovered the rich grave of a warrior who was buried at the dawn of European civilization.

He lies with a yardlong bronze sword and a remarkable collection of gold rings, precious jewels and beautifully carved seals. Archaeologists expressed astonishment at the richness of the find and its potential for shedding light on the emergence of the Mycenaean civilization, the lost world of Agamemnon, Nestor, Odysseus and other heroes described in the epics of Homer.

“Probably not since the 1950s have we found such a rich tomb,” said James C. Wright, the director of the American School of Classical Studies at Athens. Seeing the tomb “was a real highlight of my archaeological career,” said Thomas M. Brogan, the director of the Institute for Aegean Prehistory Study Center for East Crete, noting that “you can count on one hand the number of tombs as wealthy as this one.”

The warrior’s grave belongs to a time and place that give it special significance. He was buried around 1500 B.C., next to the site on Pylos on which, many years later, arose the palace of Nestor, a large administrative center that was destroyed in 1180 B.C., about the same time as Homer’s Troy. The palace was part of the Mycenaean civilization; from its ashes, classical Greek culture arose several centuries later.