This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Ottoman or Persian Inscribed Helmet with Neck Guard of Mail and Nose Guard Walters . This helmet bears the distinctive mark tamga of the St Irene royal arsenal in Istanbul capital of the Ottoman Dynasty of Turkey Composed of circle enclosing loop over three vertical lines the stamp is clearly visible to the right of the nose guard