Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Monuments Zone of Tlacotalpan' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
Tlacotalpan is a town in Tlacotalpan Municipality in the Mexican state of Veracruz, declared a World Heritage Site by UNESCO in 1998 primarily for its architecture and colonial-era layout.
Starting in the latter 20th century, efforts to conserve the town's Spanish/Caribbean architecture and layout began, culminating in World Heritage status.
It is a World Heritage Site because of its layout, architecture, history and traditions.
World Heritage Site plaque in the main square
[2] In 1998, it was named a World Heritage Site by UNESCO for its history as a river port, its architecture and its traditions in poetry, music and dance.