Many dispute the modern scientific tests that have proven it to be a medieval fabrication, and crowds of faithful and merely curious still visit its black marble chapel, a masterpiece of Guarini's High Baroque, with its cone-shaped, six-tiered dome formed by a web of intersecting arches that rise to a 12-pointed star.
Five scientists were involved in the tests which proved that it was a medieval fabrication. 
mnli hypothesis: Five scientists were involved in the tests which proved that it was a medieval fabrication.  premise: Many dispute the modern scientific tests that have proven it to be a medieval fabrication, and crowds of faithful and merely curious still visit its black marble chapel, a masterpiece of Guarini's High Baroque, with its cone-shaped, six-tiered dome formed by a web of intersecting arches that rise to a 12-pointed star.