obtaining data from the lab
In 2016, the excavation team used a method known as optical stimulated luminescence (OSL) to determine the last time the collected material was exposed to light. This would provide scientific evidence that would prove the precise dating of the chamber. The results came back after almost a year. The most recent evidence indicates that the sepulchral slab and hidden cover were last exposed during the 4th century, despite earlier evidence linking the chamber to the period of the Romans before the Christian conversion. This was the same time that Constantine built the first Church of the Holy Sepulchre!

obtain data from the laboratory
More evidence
Throughout the depth of the chamber, more discoveries were found that could provide a convincing archaeological record. The dating of the marble slab and cover was confirmed by the analysis of mortar extracted from the south wall of the tomb. This was very positive news for the Athens team and the monks who had the opportunity to supervise the work. It is unlikely that the marble slabs and the burial chamber will be reopened after the restoration. The excavation findings provided new information that will forever change the perspective of people around the world on Christianity’s holiest site. The consequences spread around the world.

More evidence