Mae gogoniant mwyaf Tyndyrn, sef yr Eglwys Gothig anhygoel, wedi sefyll ar lannau’r Afon Gwy ers dros 700 mlynedd. Dros y canrifoedd, mae’r tywydd wedi erydu’r gwaith carreg meddal canoloesol, a bellach mae prosiect cadwraeth mawr yn mynd rhagddo er mwyn diogelu’r heneb a sicrhau ei bod yn ddiogel ar gyfer ymwelwyr.
Tintern’s greatest glory, the superb Gothic Church, has stood on the banks of the River Wye for over 700 years. Over the centuries, the weather has eroded the soft medieval stonework and  a large-scale conservation project is now underway to preserve the monument and make it safe for visitors.