Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Samarkand – Crossroad of Cultures' has mentioned 'World' in the following places:
Occurrence Sentence Text Source
Under Ulugbek Samarkand became one of the world centers of medieval science.
Her main instrument was the wall quadrant, which had no equal in the world.
The historic town of Samarkand, located in a large oasis in the valley of the Zerafshan River, in the north-eastern region of Uzbekistan, is considered the crossroads of world cultures with a history of over two and a half millennia.