I wanted to go over this article by William Lane Craig which includes a discussion of the empty tomb, along with the other minimal facts that support the resurrection.
The word resurrection means bodily resurrection
The concept of resurrection in use among the first converts to Christianity was a Jewish concept of resurrection. And that concept of resurrection is unequivocally in favor of a bodily resurrection. The body (soma) that went into the grave is the body (soma) that came out.
Craig explains what this means with respect to the fast start of Christian belief:
For a first century Jew the idea that a man might be raised from the dead while his body remained in the tomb was simply a contradiction in terms. In the words of E. E. Ellis, “It is very unlikely that the earliest Palestinian Christians could conceive of any distinction between resurrection and physical, ‘grave emptying’ resurrection. To them an anastasis without an empty grave would have been about as meaningful as a square circle.”
Even if the disciples had believed in the resurrection of Jesus, it is doubtful they would have generated any following. So long as the body was interred in the tomb, a Christian movement founded on belief in the resurrection of the dead man would have been an impossible folly.
It’s significant that the belief in the resurrection started off in the city where the tomb was located. Anyone, such as the Romans or Jewish high priests, who wanted to nip the movement in the bud could easily have produced the body to end it all. They did not do so, because they could not do so, although they had every reason to do so.
There are multiple early, eyewitness sources for the empty tomb
Paul’s early creed from 1 Corinthians 15:3-7, dated to within 5 years of the crucifixion, implies the empty tomb.
In the formula cited by Paul the expression “he was raised” following the phrase “he was buried” implies the empty tomb. A first century Jew could not think otherwise. As E. L. Bode observes, the notion of the occurrence of a spiritual resurrection while the body remained in the tomb is a peculiarity of modern theology. For the Jews it was the remains of the man in the tomb which were raised; hence, they carefully preserved the bones of the dead in ossuaries until the eschatological resurrection. There can be no doubt that both Paul and the early Christian formula he cites pre-suppose the existence of the empty tomb.
The dating of the resurrection as having occurred “on the third day” implies the empty tomb. The date specified for the resurrection would have been the date that the tomb was discovered to be empty.
The phrase “on the third day” probably points to the discovery of the empty tomb. Very briefly summarized, the point is that since no one actually witnessed the resurrection of Jesus, how did Christians come to date it “on the third day?” The most probable answer is that they did so because this was the day of the discovery of the empty tomb by Jesus’ women followers. Hence, the resurrection itself came to be dated on that day. Thus, in the old Christian formula quoted by Paul we have extremely early evidence for the existence of Jesus’ empty tomb.
A few quotes from atheist historians not from Dr. Craig’s article: (thanks to Eric of Ratio Christi OSU)
Michael Goulder (Atheist NT Prof. at Birmingham) “…it goes back at least to what Paul was taught when he was converted, a couple of years after the crucifixion.” [“The Baseless Fabric of a Vision,” in Gavin D’Costa, editor, Resurrection Reconsidered (Oxford, 1996), 48.]
Gerd Lüdemann (Atheist Prof of NT at Göttingen): “…the elements in the tradition are to be dated to the first two years after the crucifixion of Jesus…not later than three years… the formation of the appearance traditions mentioned in I Cor.15.3-8 falls into the time between 30 and 33 CE.” [The Resurrection of Jesus, trans. by Bowden (Fortress, 1994), 171-72.]
Robert Funk (Non-Christian scholar, founder of the Jesus Seminar): “…The conviction that Jesus had risen from the dead had already taken root by the time Paul was converted about 33 C.E. On the assumption that Jesus died about 30 C.E., the time for development was thus two or three years at most.” [Roy W. Hoover, and the Jesus Seminar, The Acts of Jesus, 466.]
The early pre-Markan burial narrative mentions the empty tomb. This source pre-dates Mark, the earliest gospel. The source has been dated by some scholars to the 40s. For example, the atheist scholar James Crossley dates Mark some time in the 40s. (See the debate below)
The empty tomb story is part of the pre-Markan passion story and is therefore very old. The empty tomb story was probably the end of Mark’s passion source. As Mark is the earliest of our gospels, this source is therefore itself quite old. In fact the commentator R. Pesch contends that it is an incredibly early source. He produces two lines of evidence for this conclusion:
(a) Paul’s account of the Last Supper in 1 Cor. 11:23-5 presupposes the Markan account. Since Paul’s own traditions are themselves very old, the Markan source must be yet older.
(b) The pre-Markan passion story never refers to the high priest by name. It is as when I say “The President is hosting a dinner at the White House” and everyone knows whom I am speaking of because it is the man currently in office. Similarly the pre-Markan passion story refers to the “high priest” as if he were still in power. Since Caiaphas held office from AD 18-37, this means at the latest the pre-Markan source must come from within seven years after Jesus’ death. This source thus goes back to within the first few years of the Jerusalem fellowship and is therefore an ancient and reliable source of historical information.
So we are dealing with very early sources for the empty tomb.
Lack of legendary embellishments
The empty tomb narrative in the gospels lacks legendary embellishments, unlike later 2nd century forgeries that originated outside of Jerusalem.
The eyewitness testimony of the women
This is the evidence that has been the most convincing to skeptics, and to me as well.
The tomb was probably discovered empty by women. To understand this point one has to recall two facts about the role of women in Jewish society.
(a) Woman occupied a low rung on the Jewish social ladder. This is evident in such rabbinic expressions as “Sooner let the words of the law be burnt than delivered to women” and “Happy is he whose children are male, but woe to him whose children are female.”
(b) The testimony of women was regarded as so worthless that they were not even permitted to serve as legal witnesses in a court of law. In light of these facts, how remarkable must it seem that it is women who are the discoverers of Jesus’ empty tomb. Any later legend would certainly have made the male disciples to discover the empty tomb. The fact that women, whose testimony was worthless, rather than men, are the chief witnesses to the empty tomb is most plausibly accounted for by the fact that, like it or not, they were the discoverers of the empty tomb and the gospels accurately record this.
The earliest response from the Jewish high priests assumes the empty tomb
This report from Matthew 28 fulfills the criteria of enemy attestation, although Matthew is not the earliest source we have. Oh, well.
In Matthew 28, we find the Christian attempt to refute the earliest Jewish polemic against the resurrection. That polemic asserted that the disciples stole away the body. The Christians responded to this by reciting the story of the guard at the tomb, and the polemic in turn charged that the guard fell asleep. Now the noteworthy feature of this whole dispute is not the historicity of the guards but rather the presupposition of both parties that the body was missing. The earliest Jewish response to the proclamation of the resurrection was an attempt to explain away the empty tomb. Thus, the evidence of the adversaries of the disciples provides evidence in support of the empty tomb.
See it used in a debate
You can see the arguments made and defended from criticism in this debate with the atheist scholar James Crossley.
This my favorite resurrection debate.