cupolas of nedjmeddin kubra najm ad-din al-kubra mausoleum in the ancient konye-urgench, turkmenista

religion konyeurgench tamerlane abandoned monument historic karakum archeology turkmenistan mausoleum desert islamic muslim tomb historical unesco architecture asia history ancient ruins medieval dome tourism building dynasty complex landmark timur urgench old heritage site culture nedjmeddin kubra najm addin alkubra cupola brick pigeon