<prompt> Translate the following text to EnglishSehemu kubwa zaidi ya mabaki ya kale ya mji huo ni ya kale ya Kirumi, na eneo hilo liliharibiwa na Knights ya St. John wakati walipoondoa marumaru kutoka kwa mji huo ili kujenga ngome yao katika mji wa Kos.  <response>: Many of the largest remains date from the Roman, rather than the Classical Greek era, and the site was damaged by the Knights of St. John when they removed marble from it to build their castle in Kos Town. 