New chambers have been discovered under Basilica di Santa Croce in Jerusalem | Photo: Livioandronico2103, via Wikimedia Commons
In 2017, under the Basilica di Santa Croce in Jerusalem, new chambers were discovered, which were supposedly built in the 4th century CE. They were part of the domusHelena – the mother of the Roman Emperor Constantine I.
The uncovered rooms were probably private quarters. According to tradition, Helena – who became a saint – kept Christian relics from Jerusalem in her shrine at home. The floor, in turn, was covered with earth from the Holy Land.