 A number of sources put forth claims on having observed fragments of Hellenic masonry under the existing walls, but these fell short of having acquired general acceptance.The long hollow west of the castle marks the site of the Stadium, scene of the martyrdom of St. Polycarp, and it is now completely built over.This is also the case for the ancient theatre of Smyrna, which is located to the east of the castle gates, although there a few traces are still visible to the naked eye.